opentelemetry-cpp project CI

[esigo]

Adds needs-triage label to new PRs and issues.
Also adds a comment to issues with help wanted label.

This would help us to identify items which needs maintainer reaction more easily.

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[codecov]

Codecov Report

Merging #2071 (b13d9bd) into main (d6cebe1) will decrease coverage by 0.02%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2071      +/-   ##
==========================================
- Coverage   87.49%   87.47%   -0.02%     
==========================================
  Files         169      169              
  Lines        4891     4891              
==========================================
- Hits         4279     4278       -1     
- Misses        612      613       +1     

see 1 file with indirect coverage changes

[owent]

LGTM and thanks.

[marcalff]

LGTM.

Thanks for the automation.