Inline diagnostic group

Author: AmrDeveloper

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -10271,7 +10271,8 @@ def warn_depr_array_comparison : Warning<
 
 def warn_array_comparison : Warning<
   "comparison between two arrays compare their addresses and will be deprecated in c++20; "
-  "to compare array addresses, use unary '+' to decay operands to pointers">;
+  "to compare array addresses, use unary '+' to decay operands to pointers">,
+  InGroup<DiagGroup<"array-compare">>;
 
 def warn_stringcompare : Warning<
   "result of comparison against %select{a string literal|@encode}0 is "