Revert "Revert "[AArch64][SVE][InstCombine] Canonicalize aarch64_sve_dup_x intrinsic to IR splat operation""
This reverts commit eee7d225.
Effectively relanding 98c37247
after fixing the failing tests.
Change-Id: I5d7461aeb820a2d5f1895457d824a8de4d316ee5