[clang] [clang-tools-extra] [Clang] Add a builtin that deduplicate types into a pack (PR #106730)

[Ilya Biryukov via cfe-commits]

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@@ -25,6 +25,7 @@
 #include "clang/AST/RawCommentList.h"
 #include "clang/AST/SYCLKernelInfo.h"
 #include "clang/AST/TemplateName.h"
+#include "clang/AST/Type.h"
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ilya-biryukov wrote:

I believe Clangd added it for `SubstBuiltinTemplatePackType` and it seems reasonable as the file uses it directly.
I have removed it per your suggestions, but I actually do not see a problem with "include what you see".

https://github.com/llvm/llvm-project/pull/106730