[HLSL] Raise a diagnostic on Invalid CounterDirection

This issue supersedes https://github.com/llvm/llvm-project/issues/114130 which is being divided in half.

The second half is to raise a diagnostic when CounterDirection has been marked as valid. The design should be in alignment with this [proposal](https://github.com/llvm/wg-hlsl/blob/main/proposals/0022-resource-instance-analysis.md) and not the original issue as written.