[llvm] [InstCombine] Combine or-disjoint (and->mul), (and->mul) to and->mul (PR #136013)

[Jeffrey Byrnes via llvm-commits]

jrbyrnes wrote:

Converted to draft / planned changes: on second thought, it makes more sense to integrate this with https://github.com/llvm/llvm-project/pull/135274/

https://github.com/llvm/llvm-project/pull/136013