Receive all logs if no attributes are specified

[petern48]

Description

I'm proposing a new convention where if the attributes field is empty, then it indicates we want to ingest everything that is sent. This helps users avoid having to modify which fields they want in two places. Happy to submit a PR myself. Please check out the linked issue and let me know if you approve or want any changes. Then I will finish implementing whatever else is necessary (e.g docs, tests).

Link to tracking issue

Fixes #37720

Testing

I added a TestEmptyAttributes() test to verify the behavior in logs_test.go

Documentation

I documented the new behavior in the README.md and added a separate config example of how it can be used

[dehaansa]

Looks nice overall, should have a doc update as well, and a test.

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 14 days.

[petern48]

Sorry, haven't gotten around to writing the tests and doc changes. Hope to do so soon.

[petern48]

@dehaansa Should be ready for full test and review. It's my first time contributing code to this repo, who's approval do I need to get CI running? (I see another reviewer as well as an assignee).

[dehaansa]

@dehaansa Should be ready for full test and review. It's my first time contributing code to this repo, who's approval do I need to get CI running? (I see another reviewer as well as an assignee).

Any approver or maintainer can approve CI when approval is required. I've approved them - looks like you've got some linter issues to resolve before this is ready to merge, otherwise looking good!