enhancement(transforms): Add metric for measuring task concurrency "blockage" in FunctionTransforms

[ArunPiduguDD]

Summary

Vector configuration

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Change Type

• Bug fix
• New feature
• Dependencies
• Non-functional (chore, refactoring, docs)
• Performance

Is this a breaking change?

• Yes
• No

Does this PR include user facing changes?

• Yes. Please add a changelog fragment based on our guidelines.
• No. A maintainer will apply the no-changelog label to this PR.

References

Notes

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[ArunPiduguDD]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• enhancement(transforms): Add metric for measuring task concurrency "blockage" in FunctionTransforms #25177 👈 (View in Graphite)
• enhancement(transforms): Add global option to loosen ordering guarantees in stateless transforms + introduce associated metric #25070 : 1 other dependent PR (#25071 )
• master

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