Encoding that sends raw format including resource and record attributes

[xzizka]

Component(s)

exporter/kafka

Is your feature request related to a problem? Please describe.

In this issue #35686 it was described a usecase that would require a complete record generated by OpenTelemetry Collector to be send in a RAW format. Unfortunatelly, the current raw format sends just body (https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/exporter/kafkaexporter/raw_marshaler.go#L31).

Describe the solution you'd like

Add an encoding, that would not limit the raw format to just body, but will also send resource and record attributes.

Describe alternatives you've considered

Save the whole 'message' to a variable and replace a Body with a content of this variable. It seems to me it will be resource consuming.

Additional context

Creating a follow-up issue recommended by @ChrsMark in #35686 (comment)

[github-actions]

Pinging code owners:

• exporter/kafka: @pavolloffay @MovieStoreGuy

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

[braydonk]

Triage: Issue appears to contain necessary information. Moving to waiting-for-codeowners

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• exporter/kafka: @pavolloffay @MovieStoreGuy

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