Fixes https://github.com/llvm/llvm-project/issues/192546 and https://github.com/llvm/llvm-project/issues/192558 This PR defines the TextureLoad DXIL Op (opcode 66), and implements lowering of the texture load (dx_resource_load_level) intrinsic to the DXIL op. This PR also implements the transformation of loads from texture resources (via dx_resource_getpointer) into dx_resource_load_level intrinsics. Assisted-by: Claude Opus 4.7