[AVX512] Enabling bit logic lowering
Added lowering tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224132 91177308-0d34-0410-b5e6-96231b3b80d8
Restructure code from r224097. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224133 91177308-0d34-0410-b5e6-96231b3b80d8