[SVE] Add intrinsics for logical/bitwise operations that explicitly undefine...

[SVE] Add intrinsics for logical/bitwise operations that explicitly undefine the result for inactive lanes

This patch adds new intrinsics for logical/bitwise operations and
changes the lowering for the following builtins to emit calls to
the new aarch64.sve.###.u intrinsics.
  svand_x
  svand_n_x
  svorr_x
  svorr_n_x
  sveor_x
  sveor_n_x
  svbic_x
  svbic_n_x

Reviewed By: paulwalker-arm

Differential Revision: https://reviews.llvm.org/D143499