[llvm] [SLP] Move some of X86 tests to common directory (PR #106401)

[Alexey Bataev via llvm-commits]

https://github.com/alexey-bataev commented:

These test must be either copied to AArch64 directory, or special directives REQUIRES: x86, aarch64 should be used to avoid false failed tests in some llvm configs

https://github.com/llvm/llvm-project/pull/106401