Add nightly dependency bump workflow

[ezhang6811]

Issue #, if available:

Description of changes:
Add a workflow nightly-build.yml with following actions:

• creates or checks out existing nightly-dependency-updates branch
• checks for newest versions of dependencies in opentelemetry-java-instrumentation and opentelemetry-java-contrib and bumps versions if applicable
• search for releases with breaking changes in release notes
• runs main build checks on the branch, publishes a failure metric based on the outcome.
• creates a PR with the build result and breaking changes.

Example nightly build run (failure expected due to breaking changes): https://github.com/aws-observability/aws-otel-java-instrumentation/actions/runs/20176308379
PR: #1266

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.42%. Comparing base (09e6487) to head (fec4baa).
⚠️ Report is 524 commits behind head on main.
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Additional details and impacted files

@@              Coverage Diff              @@
##               main    #1219       +/-   ##
=============================================
- Coverage     85.71%   69.42%   -16.30%     
- Complexity       19      676      +657     
=============================================
  Files             3       63       +60     
  Lines            49     3365     +3316     
  Branches          5      467      +462     
=============================================
+ Hits             42     2336     +2294     
- Misses            3      842      +839     
- Partials          4      187      +183     

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[thpierce]

Only reviewed .github/workflows