Improve Vulkan pipeline

[adam-smnk]

Expands Vulkan lowering pipeline with extra support passes to allow executing more linalg ops using Vulkan backend.

Changes:

• Missing SPIRV attributes required for lowering GPU to SPIRV ops are now automatically added to GPU modules.
• Missing lowering patterns are added to GPU to SPIRV conversion.
• GPU kernel prototypes and function launches are rewritten to be compliant with Vulkan ABI.
• More Vulkan tests are now enabled and working.

[adam-smnk]

Missing conversion patterns have to be added directly to the upstream GPU to SPIRV conversion pass as this conversion cannot be split into multiple steps. This addition could be upstreamed later if it works well.

The SPIRV attribute adding passes are taken from IMEX and slightly adapted.

[rengolin]

Quick review of the source, will look at tests later

[rengolin]

Right, this has too much Vulkan specific logic for my comfort and we should look into upstreaming all of it, but for now, it should be fine. We really need to move to something like OpenCL soon.