[clang-tools-extra] [clang-doc] Display enum type along with enum name in HTML view (PR #181347)

[Samrudh Nelli via cfe-commits]

SamrudhNelli wrote:

Now we print the `QualName` only for enums with type explicitly defined.
Added some test cases for enums with `uint8_t`, `long long` as you suggested.
Updated the `MDGenerator` to print the same.

https://github.com/llvm/llvm-project/pull/181347