allow multiple log group names/arns to be set in environmental variables for xray exporter

[pxaws]

Description:

This commit is to allow users to set multiple log group names or arns using environmental variable. We choose to use & to separate individual log group name or arn because & is not allowed in log group names (https://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_CreateLogGroup.html) and & implicitly means 'AND'.

Link to tracking Issue:
N/A

Testing:

Unit tests.

Manual end 2 end test confirmed that we get 2 log groups in the raw trace with the change. Note the cloudwatch_logs field below:

{
    "Id": "1-667339a9-c872ab16dbc29a0c11b60c8d",
    "Duration": 0.001,
    "LimitExceeded": false,
    "Segments": [
        {
            "Id": "c1e85cd075339ff9",
            "Document": {
                "id": "c1e85cd075339ff9",
                "name": "vets-service-ec2-java",
                "start_time": 1718827433.377284,
                "trace_id": "1-667339a9-c872ab16dbc29a0c11b60c8d",
                "end_time": 1718827433.3779771,
                "fault": false,
                "error": false,
                "throttle": false,
                "http": {
                    "request": {
                        "url": "http://172.31.47.118:36131/actuator/health",
                        "method": "GET",
                        "user_agent": "ReactorNetty/1.0.18"
                    },
                    "response": {
                        "status": 200,
                        "content_length": 0
                    }
                },
                "aws": {
                    "account_id": "868155213681",
                    "ec2": {
                        "availability_zone": "us-east-1b",
                        "instance_id": "i-0f496fe9393def8f7",
                        "instance_size": "t3.medium",
                        "ami_id": "ami-03934437c323e0de2"
                    },
                    "xray": {
                        "auto_instrumentation": true,
                        "sdk_version": "1.34.1",
                        "sdk": "opentelemetry for java"
                    },
                    "cloudwatch_logs": [
                        {
                            "log_group": "/aws/application-signals/data"
                        },
                        {
                            "log_group": "/aws/appsignals/generic"
                        }
                    ]
                },
                "annotations": {
                    "aws.local.service": "vets-service-ec2-java",
                    "aws.local.operation": "GET /actuator/health",
                    "aws.local.environment": "ec2:default"
                },
                "metadata": {
                    "default": {
                        "net.sock.peer.addr": "172.31.39.3",
                        "otel.resource.process.command_args": [
                            "/usr/lib/jvm/java-17-amazon-corretto.x86_64/bin/java",
                            "-jar",
                            "spring-petclinic-vets-service-2.6.7.jar"
                        ],
                        "otel.resource.host.arch": "amd64",
                        "otel.resource.host.name": "ip-172-31-47-118.ec2.internal",
                        "otel.resource.aws.log.group.names": "/aws/application-signals/data&/aws/appsignals/generic",
                        "thread.name": "http-nio-auto-1-exec-4",
                        "otel.resource.service.name": "vets-service-ec2-java",
                        "otel.resource.telemetry.auto.version": "1.32.2-aws",
                        "aws.span.kind": "LOCAL_ROOT",
                        "net.sock.host.addr": "172.31.47.118",
                        "otel.resource.process.pid": 472258,
                        "otel.resource.os.description": "Linux 6.1.91-99.172.amzn2023.x86_64",
                        "net.protocol.name": "http",
                        "otel.resource.cloud.platform": "aws_ec2",
                        "otel.resource.os.type": "linux",
                        "net.sock.peer.port": 51588,
                        "otel.resource.cloud.region": "us-east-1",
                        "otel.resource.host.type": "t3.medium",
                        "thread.id": 43,
                        "otel.resource.telemetry.sdk.name": "opentelemetry",
                        "otel.resource.service.version": "2.6.7",
                        "otel.resource.cloud.availability_zone": "us-east-1b",
                        "otel.resource.host.image.id": "ami-03934437c323e0de2",
                        "otel.resource.process.runtime.description": "Amazon.com Inc. OpenJDK 64-Bit Server VM 17.0.11+9-LTS",
                        "otel.resource.process.runtime.version": "17.0.11+9-LTS",
                        "Host": "ip-172-31-47-118.ec2.internal",
                        "otel.resource.host.id": "i-0f496fe9393def8f7",
                        "otel.resource.cloud.account.id": "868155213681",
                        "otel.resource.process.executable.path": "/usr/lib/jvm/java-17-amazon-corretto.x86_64/bin/java",
                        "otel.resource.telemetry.sdk.version": "1.34.1",
                        "http.route": "/actuator/health",
                        "EC2.InstanceId": "i-0f496fe9393def8f7",
                        "PlatformType": "AWS::EC2",
                        "otel.resource.process.runtime.name": "OpenJDK Runtime Environment",
                        "otel.resource.telemetry.sdk.language": "java",
                        "otel.resource.cloud.provider": "aws",
                        "net.protocol.version": "1.1",
                        "net.sock.host.port": 36131
                    }
                },
                "service": {
                    "version": "2.6.7"
                },
                "origin": "AWS::EC2::Instance",
                "subsegments": [
                    {
                        "id": "51aaeb8354a93a73",
                        "name": "OperationHandler.handle",
                        "start_time": 1718827433.3773975,
                        "end_time": 1718827433.3779185,
                        "fault": false,
                        "error": false,
                        "throttle": false,
                        "aws": {
                            "account_id": "868155213681",
                            "ec2": {
                                "availability_zone": "us-east-1b",
                                "instance_id": "i-0f496fe9393def8f7",
                                "instance_size": "t3.medium",
                                "ami_id": "ami-03934437c323e0de2"
                            },
                            "xray": {
                                "auto_instrumentation": true,
                                "sdk_version": "1.34.1",
                                "sdk": "opentelemetry for java"
                            },
                            "cloudwatch_logs": [
                                {
                                    "log_group": "/aws/application-signals/data"
                                },
                                {
                                    "log_group": "/aws/appsignals/generic"
                                }
                            ]
                        },
                        "annotations": {
                            "aws.local.operation": "GET /actuator/health",
                            "aws.local.environment": "ec2:default"
                        },
                        "metadata": {
                            "default": {
                                "EC2.InstanceId": "i-0f496fe9393def8f7",
                                "Host": "ip-172-31-47-118.ec2.internal",
                                "PlatformType": "AWS::EC2",
                                "thread.name": "http-nio-auto-1-exec-4",
                                "thread.id": 43
                            }
                        }
                    }
                ]
            }
        }
    ]
}

Documentation:
An example in the readme for xray exporter

[wangzlei]

LGTM!

[lisguo]

kubernetes-test is failing due to a unit test in receiver/kubeletstatsreceiver unrelated to the changes here.

linter is failing due to container insights:

Error: awscontainerinsightreceiver/internal/stores/kubeletutil/podresourcesclient.go:51:15: SA1019: grpc.DialContext is deprecated: use NewClient instead.  Will be supported throughout 1.x. (staticcheck)
	conn, err := grpc.DialContext(ctx,