chore: Add metadata action - step 1

[mvicknr]

Overview

This PR adds the ability for the NR agent team to send agent metadata and binaries to New Relic for use in fleets and other features. This will be triggered normally during a release. but if it fails, it will not fail the release. It can also be run on-demand for backfilling older agent versions, to make corrections, or to re-run the job after a failure.

GH action info: https://github.com/newrelic/agent-metadata-action/blob/main/README.md

Testing

This PR is step 1 that will use aTestAgent agent name instead of NRPythonAgent
This PR needs to be merged to main in order to run the new on-demand workflow
A later PR will add a step in the release and use the real agent name

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	8		0	0	0.9s
✅ MARKDOWN	markdownlint	7	0	0	0	1.28s
✅ PYTHON	ruff	967	0	0	0	0.99s
✅ PYTHON	ruff-format	967	0	0	0	0.34s
✅ YAML	prettier	19	2	0	0	1.56s
✅ YAML	v8r	19		0	0	4.79s
✅ YAML	yamllint	19		0	0	0.69s

See detailed reports in MegaLinter artifacts

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.68%. Comparing base (c88814a) to head (d4d4dc0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1656      +/-   ##
==========================================
+ Coverage   81.67%   81.68%   +0.01%     
==========================================
  Files         210      210              
  Lines       24655    24655              
  Branches     3884     3884              
==========================================
+ Hits        20136    20139       +3     
+ Misses       3201     3198       -3     
  Partials     1318     1318              

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