[3.14] GH-135287: clang-cl PGO builds on Windows fail with `could not open '/GENPROFILE'` (GH-135289)

GH-135287: clang-cl PGO builds on Windows fail with `could not open '/GENPROFILE'` (GH-135289)
(cherry picked from commit 0045100ccbc3919e8990fa59bc413fe38d21b075)

Co-authored-by: Chris Eibl <138194463+chris-eibl@users.noreply.github.com>