Refactor: common resolve registry with policy checks

[jerbly]

• Refactored CLI registry commands to remove some duplication. Resolving the registry with policy checks is common for generate, resolve and check.
• Added missing after_resolution policy checks to generate and resolve through the common code.
• Removed duplication in CLI args to maintain consistency.
• Removed the deprecated --registry-git-sub-dir option.
• Fixed bug in check if --skip-policies was specified then it would not fail for any validation errors. e.g. this fails registry check -r "https://github.com/open-telemetry/semantic-conventions/archive/refs/tags/v1.27.0.zip[model]" --future but this would pass registry check -r "https://github.com/open-telemetry/semantic-conventions/archive/refs/tags/v1.27.0.zip[model]" --future --skip-policies

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.5%. Comparing base (dc69528) to head (8a4e24f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #536     +/-   ##
=======================================
- Coverage   74.5%   74.5%   -0.1%     
=======================================
  Files         51      51             
  Lines       3960    3960             
=======================================
- Hits        2954    2953      -1     
- Misses      1006    1007      +1     

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[jsuereth]

Overall, really great cleanup!!! Just want to check on some functionality that may have also not been consistent across commands.

[lquerel]

Great cleanup, and thank you for doing that!