[llvm] [VectorCombine] Add Ext and Trunc support in foldBitOpOfCastConstant (PR #157822)

[Hongyu Chen via llvm-commits]

XChy wrote:

Oh, you mean updating `AArch64/shrink-types.ll`? We should write a script to automatically update most testcases in LLVM, instead of simply updating one testcase here. Maybe we can post an issue to track it.

https://github.com/llvm/llvm-project/pull/157822