opentelemetry-sdk: sketch of an OpAMP integration

[xrmx]

Description

This is a basic integration for setting up OpAMP in the sdk configurator.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A

Does This PR Require a Contrib Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[github-actions]

This PR has been automatically marked as stale because it has not had any activity for 14 days. It will be closed if no further activity occurs within 14 days of this comment.
If you're still working on this, please add a comment or push new commits.

[github-actions]

This PR has been automatically marked as stale because it has not had any activity for 14 days. It will be closed if no further activity occurs within 14 days of this comment.
If you're still working on this, please add a comment or push new commits.

[xrmx]

In my distro I initialize the OpAMP client after the sdk has been setup but can't exclude other scenarios

[MikeGoldsmith]

Should we add this a SIG topic to get the execution order?

[xrmx]

I've renamed the entry point to pre_sdk_init_function so that we can add a post_sdk_init_function if required

[pmcollins]

Thanks for doing this. Added a comment.

[MikeGoldsmith]

Should we add this a SIG topic to get the execution order?

[xrmx]

Added both a pre and post init hook. Failures in the tests looks unrelated but need to take a closer look at them since they are reproducible on CI only on this branch.

[emdneto]

Thanks for the PR!

Just a heads-up: we no longer update CHANGELOG.md directly. The changelog is now generated from changelog fragments using Towncrier.

Please add the appropriate changelog fragment for this change instead of editing CHANGELOG.md manually. You can find the instructions and expected format in CONTRIBUTING.md.