[InstCombine] Combine instructions of type or/and where AND masks can be combined.

The patch simplifies some of the patterns as below

(A | (B & C0)) | (B & C1) -> A | (B & C0|C1)
((B & C0) | A) | (B & C1) -> (B & C0|C1) | A

In some scenarios like byte reverse on half word, we can see this pattern multiple times and this conversion can optimize these patterns.

Differential Revision: https://reviews.llvm.org/D124119