Add tests on the feature`subgroup-size-control`

[Jiawei-Shao]

This issue tracks the efforts on the tests against the WebGPU feature subgroup-size-control based on the WebGPU SPEC PR (gpuweb/gpuweb#5578).

API Validations:

• Enabling subgroup-size-control on the creation of device should also enable subgroups.

Shader Validations:

• Enabling subgroup_size_control must also enable subgroups.
• The WGSL attribute @subgroup_size cannot be used when subgroup_size_control is not enabled.
• @subgroup_size can only be used in the compute stage
• The value of @subgroup_size must be a constant expression or an override expression that resolves to an i32 or an u32.
• The value of @subgroup_size must be a power of 2.
• The x-dimension of the entry point's workgroup_size must be a multiple of the @subgroup_size value.

Shader Execution Tests:

• The value of the built-in variable subgroup_size must equal the value of the @subgroup_size attribute.
• At least one value in the range of [GPUAdapterInfo.subgroupMinSize, GPUAdapterInfo.subgroupMaxSize] can be used as @subgroup_size attribute in a simple compute pipeline.

[kainino0x]

• The WGSL attribute @subgroup_size must be used when subgroup_size_control is enabled.

This seems wrong, do you mean the reverse? (The feature must be enabled to use the attribute)

[Jiawei-Shao]

• The WGSL attribute @subgroup_size must be used when subgroup_size_control is enabled.

This seems wrong, do you mean the reverse? (The feature must be enabled to use the attribute)

Yes it was my fault. I've corrected it.