Additional Windows Image Updates

[AndrewKahr]

Changes

• Fix Unity Pathing
• Update tests to use windows-2022 for new images
• Bump docker image tag
• Bump action versions
• Improve PR template
• Fix workflow naming for Macos
• Only build test project on supported Unity versions (LTS and latest tech stream)

Note: Tests will fail while images don't exist. The docker repo tests contain a representative test run of these changes here.

Checklist

• Read the contribution guide and accept the
  code of conduct
• Docs (If new inputs or outputs have been added or changes to behavior that should be documented. Please make
  a PR in the documentation repo)
• Readme (updated or not needed)
• Tests (added, updated or not needed)

[github-actions]

[codecov-commenter]

Codecov Report

Merging #589 (3a45df4) into main (4c4611c) will not change coverage.
The diff coverage is 50.00%.

❗ Current head 3a45df4 differs from pull request most recent head f623864. Consider uploading reports for the commit f623864 to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #589   +/-   ##
=======================================
  Coverage   37.22%   37.22%           
=======================================
  Files          77       77           
  Lines        3060     3060           
  Branches      649      649           
=======================================
  Hits         1139     1139           
  Misses       1771     1771           
  Partials      150      150           

Files	Coverage Δ
src/model/image-tag.ts	48.88% <50.00%> (ø)