Revert "Revert "Avoid scratch register exhaustion during ARM64 stack slot moves.""

This reverts commit 122ceb492f37e97d022cba2221a87368f1847f5f.

Test: m test-art-target on ARM64, with and without read barriers/heap poisoning.
Bug: 32545705
Change-Id: I4b447d762082eea8edfabeb070317d274e2f5bd0
4 files changed