[MTE] Also test alignment and size of MTE globals (#112039)

Author: fmayer

llvm/test/MC/AArch64/global-tagging.ll

@@ -43,9 +43,17 @@
 ; CHECK-YAML-NEXT: -
 
 ; CHECK-ASM: .memtag internal_four
+; CHECK-ASM .p2align        4
+; CHECK-ASM: .size   internal_four, 16
 ; CHECK-ASM: .memtag four
+; CHECK-ASM .p2align        4
+; CHECK-ASM: .size   four, 16
 ; CHECK-ASM: .memtag sixteen
+; CHECK-ASM .p2align        4
+; CHECK-ASM: .size   sixteen, 16
 ; CHECK-ASM: .memtag huge
+; CHECK-ASM .p2align        4
+; CHECK-ASM: .size   huge, 16777232
 ; CHECK-ASM-NOT: .memtag specialcaselisted
 
 @internal_four = internal global i32 1, sanitize_memtag