[NFC][TLI] Improve tests for ArmPL and SLEEF Intrinsics.

Auto-generate test `armpl-intrinsics.ll`, and use active lane mask to
have shorter `shufflevector` check lines.

Update scripts now add `@llvm.compiler.used` instead of using the regex:
`@[[LLVM_COMPILER_USED:[a-zA-Z0-9_$"\\.-]+]]`

Author: paschalis-mpeis