[test] Change llc -march=aarch64|arm64 to -mtriple=aarch64|arm64

Similar to commit 806761a7629df268c8aed49657aeccffa6bca449 to avoid issues due
to object file format differences. These tests are currently benign.

GitOrigin-RevId: d20190e68413634b87f0f9426312a0e9d8456d18
45 files changed