[clang] [Clang] Use ExtWarn for static local variable in extern inline function (fixes #39524) (PR #166332)

[V S Susi Krishna via cfe-commits]

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@@ -6339,9 +6339,11 @@ def warn_c2y_compat_internal_in_extern_inline : Warning<
   "using static %select{function|variable}0 %1 in an inline function with "
   "external linkage is incompatible with standards before C2y">,
   InGroup<CPre2yCompat>, DefaultIgnore;
-def warn_static_local_in_extern_inline : Warning<
-  "non-constant static local variable in inline function may be different "
-  "in different files">, InGroup<StaticLocalInInline>;
+def warn_static_local_in_extern_inline
+    : ExtWarn<"non-constant static local variable in inline function may be "
+              "different "
+              "in different files">,
+      InGroup<StaticLocalInInline>;
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Susikrishna wrote:

Done. Added the release note and reverted unrelated formatting changes.

https://github.com/llvm/llvm-project/pull/166332