[clang] [Clang] Add BuiltinTemplates.td to generate code for builtin templates (PR #123736)

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git-clang-format --diff c25bd6e35134f591ee7dfeb4494df02987106f7e ae765ca2a5e63ecc22068d7f0ad2aad6c3bc4da3 --extensions cpp,h -- clang/utils/TableGen/ClangBuiltinTemplatesEmitter.cpp clang/include/clang/AST/ASTContext.h clang/include/clang/AST/DeclID.h clang/include/clang/Basic/Builtins.h clang/lib/AST/ASTContext.cpp clang/lib/AST/ASTImporter.cpp clang/lib/AST/DeclTemplate.cpp clang/lib/Lex/PPMacroExpansion.cpp clang/lib/Sema/SemaLookup.cpp clang/lib/Serialization/ASTReader.cpp clang/lib/Serialization/ASTWriter.cpp clang/utils/TableGen/TableGen.cpp clang/utils/TableGen/TableGenBackends.h
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/include/clang/AST/ASTContext.h b/clang/include/clang/AST/ASTContext.h
index eed257e4d9..98db5522d5 100644
--- a/clang/include/clang/AST/ASTContext.h
+++ b/clang/include/clang/AST/ASTContext.h
@@ -410,7 +410,6 @@ class ASTContext : public RefCountedBase<ASTContext> {
   /// The identifier 'NSCopying'.
   IdentifierInfo *NSCopyingName = nullptr;
 
-
 #define BuiltinTemplate(BTName) mutable IdentifierInfo *Name##BTName = nullptr;
 #include "clang/Basic/BuiltinTemplates.inc"
 

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https://github.com/llvm/llvm-project/pull/123736