Improve Windows path canonicalization (#43423)

Path canonicalization on windows will now favor keeping the drive letter
intact when canonicalizing paths. This helps some lsps with mapped
network drive compatibility.

Closes #41336 

Release Notes:

- N/A
d295ff4f04localcc committed on 11/24/2025, 7:48:16 PM· committed by GitHubparent7ce4f2a
1 file changedLine totals unavailable