[3.13] Add profile-gen-stamp to .gitignore (GH-133188) (#133189)

Add `profile-gen-stamp` to `.gitignore` (GH-133188)
(cherry picked from commit c4b7f7c)

Co-authored-by: sobolevn <[email protected]>

Author: miss-islington

.gitignore

@@ -143,6 +143,7 @@ Tools/unicode/data/
 /profile-clean-stamp
 /profile-run-stamp
 /profile-bolt-stamp
+/profile-gen-stamp
 /pybuilddir.txt
 /pyconfig.h
 /python-config