[clang] [clang][modules] Shrink the size of `Module::Headers` (PR #113395)

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``````````bash
git-clang-format --diff 2e0506f83bfde6db93454bdf28e4a71c160d4f5b 09246d11c8663c0b2b31317eddc297c1d29fcd60 --extensions h,cpp -- clang/include/clang/Basic/Module.h clang/lib/Basic/Module.cpp clang/lib/Frontend/FrontendAction.cpp clang/lib/Lex/ModuleMap.cpp clang/lib/Serialization/ASTWriter.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Lex/ModuleMap.cpp b/clang/lib/Lex/ModuleMap.cpp
index 23875912fa..a87713a6f0 100644
--- a/clang/lib/Lex/ModuleMap.cpp
+++ b/clang/lib/Lex/ModuleMap.cpp
@@ -1312,8 +1312,7 @@ void ModuleMap::addHeader(Module *Mod, Module::Header Header,
   if (!Imported || isCompilingModuleHeader) {
     // When we import HeaderFileInfo, the external source is expected to
     // set the isModuleHeader flag itself.
-    HeaderInfo.MarkFileModuleHeader(HeaderEntry, Role,
-                                    isCompilingModuleHeader);
+    HeaderInfo.MarkFileModuleHeader(HeaderEntry, Role, isCompilingModuleHeader);
   }
 
   // Notify callbacks that we just added a new header.

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https://github.com/llvm/llvm-project/pull/113395