Revert "[nfc][Driver] Remove {{(.exe)?}} from sanitizer test" again (#121280)

This reverts #121162, which was a reapply of the previous revert earlier
in #121160 - The change blatantly breaks tests on windows and it isn't
clear why it's being made.

Note that I needed to add the optional .exe suffix to a few more check
lines that were added as a follow up.

This reverts commit 8e9fda1.

Author: bogner