[5.9] Cherry-pick substitution drive fixes for Windows#7513

Merged

shahmishal merged 3 commits intoswiftlang:swift/release/5.9from

bnbarham:cherry-subtitution-drive-fixes

Sep 28, 2023

Commits on Sep 22, 2023

[lit][clang] Avoid realpath on Windows due to MAX_PATH limitations

compnerd
authored and
bnbarham
committed
[lit] Add missing os.path.normcase() to config-map-discovery test

RKSimon
authored and
bnbarham
committed
[lit] abs_path_preserve_drive - don't normalize path, leave this to the caller

RKSimon
authored and
bnbarham
committed