[InstCombine] `vector_reduce_{or,and}(?ext(<n x i1>))` -->...

[InstCombine] `vector_reduce_{or,and}(?ext(<n x i1>))` --> `?ext(vector_reduce_{or,and}(<n x i1>))` (PR51259)

This allows the expansion logic to actually trigger if the argument
was extended from i1 element type, like the rest of the reductions expect.

Alive2 agrees:
https://alive2.llvm.org/ce/z/wcfews (or zext)
https://alive2.llvm.org/ce/z/FCXNFx (or sext)
https://alive2.llvm.org/ce/z/f26zUY (and zext)
https://alive2.llvm.org/ce/z/jprViN (and sext)