[llvm] [Github] Upload built docs as artifact from test build docs job (PR #118159)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> This broke the documentation build for libc and for libc++. To test this, dummy documentation jobs should have been triggered by touching stuff in e.g. libcxx/docs. Just a heads up: I'll try fixing this for libc++, but it's possible that other people end up here after some head scratching!

Yeah, this definitely should have been tested better. I assumed the directory structure would be symmetric, but it seems like the runtimes have a different docs directory structure. Once I have some time I'll go through and check the rest of the projects and also make some modifications to the workflow so we test building all of the projects' docs if we modify the workflow definition.

Thanks for submitting the forward fixes!

https://github.com/llvm/llvm-project/pull/118159