Add support for VK_EXT_depth_clip_control

[squidbus]

SPIRV-Cross already has a flag for converting from [-w, w] depth to [0, w]. Take advantage of that to implement VK_EXT_depth_clip_control.

Ran CTS tests dEQP-VK.pipeline.monolithic.depth.depth_clip_control.*, results:

Test run totals:
  Passed:        36/72 (50.0%)
  Failed:        0/72 (0.0%)
  Not supported: 36/72 (50.0%)
  Warnings:      0/72 (0.0%)
  Waived:        0/72 (0.0%)

With the general case for Not supported just being tests using unsupported depth formats.

[cdavis5e]

This is straightforward enough.

[makigumo]

Shouldn't shouldFixupClipSpace also be added here?

MoltenVK/MoltenVK/MoltenVK/GPUObjects/MVKPipeline.mm

Lines 2725 to 2733 in aba9976

	template<class Archive>
	void serialize(Archive & archive, SPIRVToMSLConversionOptions& opt) {
	archive(opt.mslOptions,
	opt.entryPointName,
	opt.entryPointStage,
	opt.tessPatchKind,
	opt.numTessControlPoints,
	opt.shouldFlipVertexY);
	}

[squidbus]

You are right, I seem to have missed that. I've opened a fix for that here #2432