[clang] Carving out -Wformat warning about scoped enums into a subwarning (PR #88595)

[Karl-Johan Karlsson via cfe-commits]

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@@ -12,8 +12,8 @@
 // RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -std=c11 -fsyntax-only -Wformat -verify=okay %s
 
 // Verify that -Wformat-signedness with -Wno-format are not reported (gcc compat).
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karka228 wrote:

That discussion is only about -Wformat scoped enums warnings, but this patch currently move all the -Wformat warnings regarding type mismatch into a subwarning, that a lot more warnings than only scoped enums. Is that intended?

https://github.com/llvm/llvm-project/pull/88595