With this CL we reuse the implementation of AtomicStore to implement
AtomicBinops. The implementation is parametrised by an optional result
Liftoff register, and by an operation that is applied on the value
stored in the memory location.

R=clemensb@chromium.org, v8-arm-ports@googlegroups.com

Bug: v8:10108
Change-Id: I71ff5bf1632d860462d66b43c34515400eae2979
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2151349
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67302}