radv: various fixes for DGC task shader and enable it
This contains cleanups for DGC offset computations, rework of push constants for task shaders and various fixes.
VKD3D_TEST_FILTER=test_amplification_shader_execute_indirect now pass on GFX10.3.
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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
This contains cleanups for DGC offset computations, rework of push constants for task shaders and various fixes.
VKD3D_TEST_FILTER=test_amplification_shader_execute_indirect now pass on GFX10.3.