Consolidate Log Group and Log Stream Config [WIP]

[yiyuan-he]

What does this pull request do?

In the agent observability path, customers are expected to set:

AGENT_OBSERVABILITY_ENABLED=true
OTEL_RESOURCE_ATTRIBUTES="service.name=<TicketingAgent>,aws.log.group.names=</aws/genesis/TicketingAgent>,aws.log.stream.names=<stream_name>"

Previously, they also needed to manually set OTEL_EXPORTER_OTLP_LOGS_HEADERS with the same log group and stream values. This PR eliminates that redundancy by automatically inferring the headers from the resource attributes.

Changes:

• Added automatic inference of OTEL_EXPORTER_OTLP_LOGS_HEADERS from OTEL_RESOURCE_ATTRIBUTES when:
  • AGENT_OBSERVABILITY_ENABLED is set to true
  • OTEL_EXPORTER_OTLP_LOGS_HEADERS is not explicitly set
• The inference extracts aws.log.group.names and aws.log.stream.names from resource attributes and maps them to the required OTLP headers (x-aws-log-group and x-aws-log-stream)
• Explicit OTEL_EXPORTER_OTLP_LOGS_HEADERS values still take priority over inferred values, maintaining backward compatability

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