Update a few tests to use default waitcnt pass (si-insert-waitcnts) rather than old pass (si-insert-waits); this is a small step towards the overall goal of removing the old waitcnt pass, which is no longer maintained.
Note for the reviewer: For the renamed files, the only changes to those files are within the RUN cmds: s/si-insert-waits/si-insert-waitcnts