otelconsumer: set document id attribute for elasticsearchexporter

[mauri870]

Proposed commit message

In order for beats receivers to support deduplication of data like the normal beats we need to have special handling for the @metadata._id field in the beats event. In the elasticsearch beats output this metadata field is used to set the document id when ingesting the event.

The elasticsearchexporter will support dynamic id for log records in the upcoming v0.119 release via a log record attribute.

This PR adds special handling for the metadata _id field and translates it to the elasticsearch.document_id attribute.

Related issues

• For https://github.com/elastic/ingest-dev/issues/4736
• Related elasticsearchexporter dynamic id PR

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @mauri870? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit

[mergify]

backport-8.x has been added to help with the transition to the new branch 8.x.
If you don't need it please use backport-skip label and remove the backport-8.x label.

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[leehinman]

Nice.