[clang] NFC: reintroduce clang/include/clang/AST/Type.h

This reintroduces `Type.h`, having earlier been renamed to `TypeBase.h`,
as a redirection to `TypeBase.h`, and redirects most users to include the
former instead.

This is a preparatory patch for being able to provide inline definitions
for `Type` methods which would otherwise cause a circular dependency with
`Decl{,CXX}.h`.

Doing these operations into their own NFC patch helps the git rename
detection logic work, preserving the history.

This patch makes clang just a little slower to build (~0.17%), just
because it makes more code indirectly include `DeclCXX.h`.

Author: mizvekov

clang-tools-extra/clang-doc/Representation.h

@@ -14,7 +14,7 @@
 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_DOC_REPRESENTATION_H
 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_DOC_REPRESENTATION_H
 
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/Basic/Specifiers.h"
 #include "clang/Tooling/StandaloneExecution.h"
 #include "llvm/ADT/APSInt.h"

clang-tools-extra/clang-include-fixer/find-all-symbols/FindAllSymbols.cpp

@@ -12,7 +12,7 @@
 #include "SymbolInfo.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclCXX.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/Tooling/Tooling.h"

clang-tools-extra/clang-tidy/bugprone/CastingThroughVoidCheck.cpp

@@ -8,7 +8,7 @@
 
 #include "CastingThroughVoidCheck.h"
 #include "clang/AST/Expr.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 

clang-tools-extra/clang-tidy/bugprone/ComparePointerToMemberVirtualFunctionCheck.cpp

@@ -10,7 +10,7 @@
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/OperationKinds.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/ASTMatchers/ASTMatchersMacros.h"

clang-tools-extra/clang-tidy/bugprone/NarrowingConversionsCheck.cpp

@@ -10,7 +10,7 @@
 #include "../utils/OptionsUtils.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Expr.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "llvm/ADT/APSInt.h"

clang-tools-extra/clang-tidy/bugprone/StandaloneEmptyCheck.cpp

@@ -14,7 +14,7 @@
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/Stmt.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/Basic/Diagnostic.h"

clang-tools-extra/clang-tidy/bugprone/UnintendedCharOstreamOutputCheck.cpp

@@ -9,7 +9,7 @@
 #include "UnintendedCharOstreamOutputCheck.h"
 #include "../utils/Matchers.h"
 #include "../utils/OptionsUtils.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/Basic/Diagnostic.h"

clang-tools-extra/clang-tidy/bugprone/UnusedLocalNonTrivialVariableCheck.cpp

@@ -11,7 +11,7 @@
 #include "../utils/OptionsUtils.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/ASTTypeTraits.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/ASTMatchers/ASTMatchersMacros.h"

clang-tools-extra/clang-tidy/cppcoreguidelines/InitVariablesCheck.cpp

@@ -10,7 +10,7 @@
 
 #include "../utils/LexerUtils.h"
 #include "clang/AST/ASTContext.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/Lex/Preprocessor.h"
 #include <optional>

clang-tools-extra/clang-tidy/misc/CoroutineHostileRAIICheck.cpp

@@ -12,7 +12,7 @@
 #include "clang/AST/Decl.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/Stmt.h"
-#include "clang/AST/TypeBase.h"
+#include "clang/AST/Type.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/ASTMatchers/ASTMatchersInternal.h"