[LegalizeTypes] Replace vecreduce_xor/or/and with vecreduce_add/umax/umin if not...

[LegalizeTypes] Replace vecreduce_xor/or/and with vecreduce_add/umax/umin if not legal

This is done during type legalization since the target representation of
these nodes may not be valid until after type legalization, and after
type legalization the fact that these are dealing with i1 types may be
lost.

Differential Revision: https://reviews.llvm.org/D128996