Note: This patch is distinct from the previous one titled
"[llvm-mca] Move bad-input.s test to be target specific"
This is a followup to #90474 and commit
afc10fc9b7ce3d23d9012f5a1496e849fe873ba2
Context: Builders failing because they're unable to run the failure
test.
This still doesn't work in various circumstances, it seems MCA doesn't
want to run on a wide variety of hosts in various configurations, so
stick to the tried and tested method and pass -mtriple and -mcpu.
458d706741