[llvm] Revert "[X86] Narrow BT/BTC/BTR/BTS compare + RMW patterns on very large integers (#165540)" (PR #165979)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@vitalybuka this was reapplied at #166176 after a fix at #166160 - annoyingly the sanitizer bot is currently red, but it appears to be due to a previous change - https://lab.llvm.org/buildbot/#/builders/66/builds/21693 - none of the old test regressions have come back but I'll keep an eye on it

https://github.com/llvm/llvm-project/pull/165979