[llvm] [X86] Support lowering for APX promoted BMI instructions. (PR #77433)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@XinWang10 This is causing failures on EXPENSIVE_CHECKS builds - please can you take a look?
https://lab.llvm.org/buildbot/#/builders/16/builds/59708
https://lab.llvm.org/buildbot/#/builders/104/builds/15157

https://github.com/llvm/llvm-project/pull/77433