[clang-tools-extra] [clang-doc] Add --asset option to clang-doc (PR #94717)

[Paul Kirth via cfe-commits]

https://github.com/ilovepi commented:

I forgot to mention, that this needs some kind of test. Please add something simple, like extra `RUN:` lines in the `SingleSource.cpp` test, that check the diagnostics emitted when using/not using  the `--assets` flag.

https://github.com/llvm/llvm-project/pull/94717