Investigate alternates to cygwin on Windows

[smlambert]

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