[SPIR-V] Implement remaining .Sample... methods for vk::SampledTexture2D type.

[luciechoi]

Part of #7979

Implement remaining sample methods methods for vk::SampledTexture2D:

float Object.SampleCmp(float Location, float CompareValue, [, int Offset], [, float Clamp] [, out uint Status]);
float Object.SampleCmpLevelZero(float Location, float CompareValue, [, int Offset], [, out uint Status]);
float Object.SampleCmpLevel(float Location, float CompareValue, float LOD, [, int Offset], [, out uint Status]);
float Object.SampleGrad(float Location, float DDX, float DDY, [, int Offset], [, float Clamp] [, out uint Status]);
float Object.SampleCompGrad(float Location, float CompareValue, float DDX, float DDY, [, int Offset], [, float Clamp] [, out uint Status]);
float Object.SampleCompBias(float Location, float CompareValue, float Bias, [, int Offset], [, float Clamp] [, out uint Status]);
PARAM_TYPE Object.SampleBias(float Location, float Bias, [, int Offset], [, float Clamp], [, out uint Status]);
PARAM_TYPE Object.SampleLevel(float Location, float LOD, [, int Offset], [, out uint Status]);