[clang] [llvm] [HLSL][RootSignature] Implement Parsing of Descriptor Tables (PR #122982)

[Finn Plummer via llvm-commits]

inbelic wrote:

Also I am also unsure why it triggered a review from all the code owners. Is it because I force-pushed before changing the target branch?

https://github.com/llvm/llvm-project/pull/122982