[InstCombine] Fold two select patterns into or-and

This patch is the follow-up improvement of D122152.
Fixes https://github.com/llvm/llvm-project/issues/64558.

`select (a | c), a, b -> select a, true, (select ~c, b, false)` where `c` is free to invert
`select (c & ~b), a, b -> select b, true, (select c, a, false)`
Alive2: https://alive2.llvm.org/ce/z/KwxtMA

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D158983