Refactor v2/yaml parsing code

[EronWright]

Proposed changes

This PR doesn't make any substantive changes to the provider, it breaks apart the parsing-and-registration code into two independent functions, in anticipation of applying component-specific sorting strategies.

Specifics:

• split the logic into Parse and Register
• split the test code accordingly
• enriches the registration data that is collected by the mock resource monitor

Related issues (optional)

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[codecov]

Codecov Report

Attention: Patch coverage is 82.60870% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 26.97%. Comparing base (1d7e3b6) to head (de3f420).

Files	Patch %	Lines
provider/pkg/provider/yaml/v2/yaml.go	78.94%	4 Missing ⚠️
provider/pkg/provider/yaml/v2/configfile.go	83.33%	1 Missing and 1 partial ⚠️
provider/pkg/provider/yaml/v2/configgroup.go	86.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2888      +/-   ##
==========================================
+ Coverage   26.91%   26.97%   +0.06%     
==========================================
  Files          53       53              
  Lines        7736     7748      +12     
==========================================
+ Hits         2082     2090       +8     
- Misses       5481     5483       +2     
- Partials      173      175       +2     

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[rquitales]

The refactor looks good. Thanks for extending the tests!