[Feature Request] Bring Expanded Comparison Sampling up to date with the specification

[pow2clk]

Since Expanded Comparison Sampling implementation (#5560) there have been some additions to the spec (microsoft/hlsl-specs#147). This includes some additional diagnostics, tests, and a feature capability bit.

Describe the solution you'd like

Details of all the below can be found in the spec.

*** Feature Bit ***

ExtendedComparisonSampling is a new feature info flag added to SFI0.
It's value is 0x80000000.
It indicates that the shadermakes use of SampleCmpBias or SampleCmpGrad.
This indicates to the runtime that that the shader requires the presence of
the corresponding capability bit.

Testing

• SampleCmpBias in an entry point of an unsupported shader stage should produce an appropriate error.

• SampleCmpBias, SampleCmpGrad, and the new CalculateLevelOfDetail* overloads in an unsupported shader model should produce an appropriate error.

• Violating the bias range limits tested by SampleBiasFail in ValidationTest with dx.op.sampleCmpBias should produce a validation error

• Using invalid Test that DXIL validation of allowed resource types must be performed for
  dx.op.sampleCmpBias and dx.op.sampleCmpGrad:

• Instr.SampleCompType - texture resources are declared with types that are
  sampleable in the current environment.

• Instr.SamplerModeForSampleC - sampler resource used by SampleCmpBias and
  SampleCmpGrad are of type SamplerComparisonState.

• Instr.ResourceKindForCalcLOD - texture resources used by
  CalculateLevelOfDetail* are among the valid texture objects.

• Instr.ResourceKindForSample - texture resources used by
  SampleCmpBias and SampleCmpGrad are among the valid texture objects.

• Instr.ResourceClassForSamplerGather - texture resources used by
  SampleCmpBias and SampleCmpGrad must be SRVs.

[pow2clk]

Fixed by #6204