[InstrRef] Fix mismatch between LiveDebugValues and salvageCopySSA (#124233) The LiveDebugValues pass and the instruction selector (which calls salvageCopySSA) need to be consistent on what they consider a copy instruction. With https://github.com/llvm/llvm-project/pull/75184, the definition of what a copy instruction is was narrowed for AArch64 to exclude a w->x ORR and treat it as a zero-extend rather than a copy However, to make sure LiveDebugValues still treats a w->x ORR as a copy, the new function, isCopyLikeInstr was created. We need to make sure that salvageCopySSA also calls that function. This patch addresses this mismatch.
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