[InstCombine] bitcast(logic(bitcast(X), bitcast(Y))) -> bitcast'(logic(bitcast'(X), Y))

This patch break foldBitCastBitwiseLogic limite the destination
must have an integer element type, and eliminate one bitcast by
doing the logic op in the type of the input that has an integer
element type.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D126184