[NFC][AArch64] Final Cleanup Pass Initialization (#137744)
This finishes the work from 23c27f3efcdda730b365698ade5fd0c1c283f2e7 to
cleanup where pass initializers are called from, as noted in #111767.
This patch addresses passes where the initializer does not start with
`initializeAArch64`, which seemed to be missed in the previous commit.
