Revert "[ConstantFold] Fold more operations to poison"

This reverts commit 53040a96 due to its
bad interaction with select i1 -> and/or i1 transformation.

This fixes:
https://bugs.llvm.org/show_bug.cgi?id=49005
https://bugs.llvm.org/show_bug.cgi?id=48435

(cherry picked from commit 06829034)