Add mandatory atomic-image formats

[Try]

In Vulkan/Dx12 R32UINT and R32INT images always support atomic operations.

In Metal it's complicated:

• Metal 3.1 has native support (requires [MTLTextureUsageShaderAtomic bit)
• pre 3.1, it's possible to do software workaround (similar to moltenvk)

[Try]

partially related:
https://developer.apple.com/forums/thread/750478 - compiler issues, on iOS with storage image

[Try]

Metal apparently has no support for non 2D linear texture, and seem to be no(?) way to emulate texture3d atomics.

Validation layer:

_mtlValidateStrideTextureParameters:1824: failed assertion `Texture Descriptor Validation
Linear texture: must have depth == 1, depth (16) disallowed
Linear texture: must be of type MTLTextureType2D or linear MTLTextureType2DArray, textureType (MTLTextureType3D) disallowed

Documentation:
https://developer.apple.com/documentation/metal/mtlbuffer/maketexture(descriptor:offset:bytesperrow:)?language=objc

Additionally, creating a linear texture from this method adds the following restrictions for the descriptor parameter’s properties:
textureType      = MTLTextureType2D or MTLTextureTypeTextureBuffer
depth            = 1
arrayLength      = 1
mipmapLevelCount = 1
sampleCount      = 1