release/19.x: [AArch64] Make apple-m4 armv8.7-a again (from armv9.2-a).#106599

tru merged 1 commit intollvm:release/19.xllvm/llvm-project:release/19.xfrom

ahmedbougacha:users/ahmedbougacha/aarch64-apple-m4-v8.7a-release-19.xahmedbougacha/llvm-project:users/ahmedbougacha/aarch64-apple-m4-v8.7a-release-19.xCopy head branch name to clipboard