Update the Arm Optimized Routines

Import revision 89ca9c3629eb6a62c28918db929a6fe80b141825 from
https://github.com/ARM-software/optimized-routines.

This is the last revision before updating the license to MIT or
Apache 2.0 + LLVM exception. As no changes have happened to the string
functions since the license update pull in the last version before it
to reduce the diff.

This version:

• Improves the performance of memcmp
• Adds SVE implementation of memcpy
• Uses the MTE version of some str* functions as they are faster

Sponsored by: The FreeBSD Foundation