[clang] [HLSL] Add support for fixed-size global resource arrays (PR #152209)

[Helena Kotas via cfe-commits]

hekota wrote:

Making this a draft for now because it only supports `register` binding and it will have conflicts with the change that adds `[[vk:binding]]` attribute (#150957). Once that gets merged, I will update this PR to resolve the conflicts and add `[[vk:binding]]` support for arrays as well.

@s-perron - is your change ready to get merged?

https://github.com/llvm/llvm-project/pull/152209