[Release 7] Improve environment finding logic on windows

[chriselion]

Proposed change(s)

Followup from a discussion with @zookae - On Windows, saving e.g. 3DBall would put the executable at 3DBall\UnityEnvironment.exe. That would mean running with --env=3DBall would not fix the executable. This improves the logic by adding an extra check if the existing one fails: search for *.exe under the env directory, and exclude UnityCrashHandler*.exe

Types of change(s)

• Other (Small improvement)

Checklist

• Added tests that prove my fix is effective or that my feature works
• Updated the changelog (if applicable)
• Updated the documentation (if applicable)
• Updated the migration guide (if applicable)

Other comments

[ervteng]

Tested, works 👍