Mark tags to bazel targets

[esigo]

Fixes #1072 (issue)

Changes

mark tags to bazel targets.

Please provide a brief description of the changes here.
can exclude targets e.g.
bazel build //... --build_tag_filters=-otlp,-es,-etw,-prometheus,-zipkin
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 #1075 (822700e) into main (9e8be67) will not change coverage.
The diff coverage is n/a.

❗ Current head 822700e differs from pull request most recent head c78b842. Consider uploading reports for the commit c78b842 to get more accurate results

@@           Coverage Diff           @@
##             main    #1075   +/-   ##
=======================================
  Coverage   94.41%   94.41%           
=======================================
  Files         158      158           
  Lines        6077     6077           
=======================================
  Hits         5737     5737           
  Misses        340      340           

[lalitb]

Thanks for adding it. Just thinking if we can we also add separate tags for:

• API ( this would be helpful for the instrumentation-only build, similar to what we do through cmake here )
• Separate tags for otlp_grpc and otlp_http ?
• Tags for tests and/or examples, to provide way to filter building tests and examples.

It's fine to add it separate from this PR if this is a bigger task ( or raise a github issue for someone to pick it up ).

[esigo]

Thanks for adding it. Just thinking if we can we also add separate tags for:

• API ( this would be helpful for the instrumentation-only build, similar to what we do through cmake here )
• Separate tags for otlp_grpc and otlp_http ?
• Tags for tests and/or examples, to provide way to filter building tests and examples.

It's fine to add it separate from this PR if this is a bigger task ( or raise a github issue for someone to pick it up ).

@lalitb thanks for the feedback.
Yeah sounds good. Let's merge this. I'll raise a separate PR to cover the rest.