[llvm] [DirectX] Implement lowering of Texture Load and Texture .operator[] (PR #193343)

[Farzon Lotfi via llvm-commits]

farzonl wrote:

For the offload test suite we were tracking this fix via: https://github.com/llvm/llvm-project/issues/101558 can you consolidate tickets?

https://github.com/llvm/llvm-project/pull/193343