[receiver/otlpjsonfile] Add support for profiles signal

[mx-psi]

Component(s)

receiver/otlpjsonfile

Describe the issue you're reporting

This receiver would be useful for testing and validation of the experimental profiling signal.

As inspiration for how to add support this PR can be used: open-telemetry/opentelemetry-collector/pull/11071

Example of configuration using profiles (needs service.profilesSupport feature gate to be enabled):

receivers:
  otlp:
    protocols:
      grpc:
exporters:
  otlp:
    endpoint: ${OTLP_ENDPOINT}
service:
  pipelines:
    profiles:
      receivers: [otlp]
      exporters: [otlp]

[github-actions]

Pinging code owners for receiver/otlpjsonfile: @djaglowski @atoulme. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners:

• receiver/otlpjsonfile: @djaglowski @atoulme

See Adding Labels via Comments if you do not have permissions to add labels yourself.