[docs] Many clang::Type sub-classes are missing on https://clang.llvm.org/doxygen/

The [doxygen diagram for `clang::Type`](https://clang.llvm.org/doxygen/classclang_1_1Type.html) is currently missing many classes, including:

- https://clang.llvm.org/doxygen/classclang_1_1TagType.html
- https://clang.llvm.org/doxygen/classclang_1_1AutoType.html
- https://clang.llvm.org/doxygen/classclang_1_1DecltypeType.html
- https://clang.llvm.org/doxygen/classclang_1_1DeducedTemplateSpecializationType.html

Additionally, all the links above currently yield 404.

The mentioned missing classes can be seen on the last snapshot on the wayback machine [here](https://web.archive.org/web/20250820030657/https://clang.llvm.org/doxygen/classclang_1_1Type.html).

Note that I wasn't able to reproduce the issue when generating the docs locally (by building `doxygen-clang`). The diagrams generated locally seem to include all these classes as expected.