Upgrade to opentelemetry-proto 1.5.0

[marcalff]

Contributes to #3201

Changes

Please provide a brief description of the changes here.

• Upgrade to opentelemetry-proto 1.5.0

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

[netlify]

✅ Deploy Preview for opentelemetry-cpp-api-docs canceled.

Name	Link
🔨 Latest commit	3242d82
🔍 Latest deploy log	https://app.netlify.com/sites/opentelemetry-cpp-api-docs/deploys/67635ee2ba64b10008f6d991

[marcalff]

@keith Please add a build for opentelemetry-proto 1.5.0 in bazel central.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.16%. Comparing base (92bf8da) to head (3242d82).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3210   +/-   ##
=======================================
  Coverage   88.16%   88.16%           
=======================================
  Files         198      198           
  Lines        6224     6224           
=======================================
  Hits         5487     5487           
  Misses        737      737           

[keith]

bazelbuild/bazel-central-registry#3445

[marcalff]

Do not merge:

CI will fail for bazel, until the bazel central repository PR is merged.