If explicit_handle is defined in the *.idl file, c/s are uses explicit handles,
then an explicit handle must be passed in to the server-side interface.
And add a test for explicit_handle.
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https://gitlab.winehq.org/wine/wine/-/merge_requests/4451
Goes atop !471. The last six commits belong to this MR.
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v4: vkd3d-shader/dxil: Emit constant global arrays as immediate constant buffers.
vkd3d-shader: Add a register index to struct vkd3d_shader_immediate_constant_buffer.
vkd3d-shader/spirv: Support declared component type and count in immediate constant buffers.
vkd3d-shader/spirv: Support constant initialisers in indexable temps.
vkd3d-shader/dxil: Support null constant arrays.
vkd3d-shader/spirv: Support declared component type and count in indexable temps.
vkd3d-shader/dxil: Implement the DXIL LOAD instruction.
vkd3d-shader/dxil: Implement the DXIL GEP instruction.
vkd3d-shader/dxil: Support global variable initialisers.
vkd3d-shader/dxil: Introduce a value type for immediate constant buffers.
vkd3d-shader/dxil: Implement default address space global variables.
https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/477
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v15: vkd3d-shader/dxil: Implement the DXIL LOAD instruction.
vkd3d-shader/dxil: Implement the DXIL GEP instruction.
vkd3d-shader/dxil: Support global variable initialisers.
vkd3d-shader/dxil: Introduce a value type for immediate constant buffers.
vkd3d-shader/dxil: Implement default address space global variables.
https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/471