Replace hard coded numbers from 462d583 with regex so the test passes on downstream projects that may define additional opcodes.

Author: dyung

llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir

@@ -550,15 +550,15 @@
 # DEBUG-NEXT: .. opcode {{[0-9]+}} is aliased to {{[0-9]+}}
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
-# DEBUG-NEXT: G_GET_FPMODE (opcode 196): 1 type index, 0 imm indices
+# DEBUG-NEXT: G_GET_FPMODE (opcode {{[0-9]+}}): 1 type index, 0 imm indices
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
-# DEBUG-NEXT: G_SET_FPMODE (opcode 197): 1 type index, 0 imm indices
-# DEBUG-NEXT: .. opcode 197 is aliased to 196
+# DEBUG-NEXT: G_SET_FPMODE (opcode {{[0-9]+}}): 1 type index, 0 imm indices
+# DEBUG-NEXT: .. opcode {{[0-9]+}} is aliased to {{[0-9]+}}
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
-# DEBUG-NEXT: G_RESET_FPMODE (opcode 198): 0 type indices, 0 imm indices
-# DEBUG-NEXT: .. opcode 198 is aliased to 196
+# DEBUG-NEXT: G_RESET_FPMODE (opcode {{[0-9]+}}): 0 type indices, 0 imm indices
+# DEBUG-NEXT: .. opcode {{[0-9]+}} is aliased to {{[0-9]+}}
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: G_PTR_ADD (opcode {{[0-9]+}}): 2 type indices, 0 imm indices