Implementation of GroupSharedLimit to allow increased GroupSharedMemory

[JoeCitizen]

Add a new HLSL attribute for Compute, Amp and Mesh shaders: GroupSharedLimit.

This is used to limit the amount of group shared memory a shader is allowed to statically declare, and validation will fail if the limit is exceeded.

There is no upper limit on this attribute, and it is expected that shader writers set the limit as the lowest common denominator for their target hardware and software use case (typically 48k or 64k for modern GPUs).

If no attribute is declared the existing 32k limit is used to be compatible with existing shaders.

Extends the PSV structures to include the selected limit so that runtime validation can reject the shader if it exceeds the device support.

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[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.

[damyanp]

Some superficial things that'll need to be addressed at some point, I'm afraid I can't really comment on the actual details of how this works.

I suspect that the whole thing needs to be run through clang-format as well.

[damyanp]

Suggested change

	void hlsl::SetShaderProps(PSVRuntimeInfo4 *pInfo4, const DxilModule &DM) {
	void hlsl::SetShaderProps(PSVRuntimeInfo4 *Info4, const DxilModule &DM) {

For new code we generally follow the LLVM Coding Standards. This includes no-p-prefix.

[damyanp]

IMO in this case following the pInfoN pattern is appropriate.

[damyanp]

Suggested change

	if (SpecifiedTGSMSize > 0) {
	MaxSize = SpecifiedTGSMSize;
	}
	if (SpecifiedTGSMSize > 0)
	MaxSize = SpecifiedTGSMSize;

LLVM coding standards say to omit braces here.

Something's also up with the formatting. Did the format-checker spot it? Anyway, clang-format should fix this for you.