[Driver][test] Clean up some xray tests

[Driver][test] Clean up some xray tests

Add explicit --target= so that the tests run on all targets, not some
that support XRay, similar to commit e1051414a16e970c2e36c2ab7dfe2b17353c4751.
For option testing, we often use a placeholder architecture (e.g., x86_64).

Fix https://github.com/llvm/llvm-project/issues/64028