Investigate alternates to cygwin on Windows

This issue is to capture activities related to whether we would have new requirements to handle with regards to supporting Windows platforms.

Relating to https://github.com/adoptium/TKG/pull/343#issuecomment-1215045839 (and https://cygwin.com/pipermail/cygwin-announce/2022-January/010438.html) and that cygwin will no longer be supported on certain Windows versions (though it may not impact the versions that we care about).

- [ ] Determine if this is an issue that should concern us
- [ ] Determine what points in TKG code would need updating/addressing if no cygwin is available

Start by reviewing the linked TKG pull request comment and Cygwin announcement to determine whether the affected Windows versions matter. Then inspect TKG code paths that assume Cygwin and document which points would need updating if it is unavailable. Done means recording the impact and required changes.

Written by the indexing model from the issue text.