Metal: Re-enable asm inejction into loops on MacOS 12+ It was confirmed that this asm injection caused issues on MacOS 11. Bug: chromium:1513738 Change-Id: I37e3af83b83de0cd447e1ff71b1f41ab755f8d4f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5309225 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>