anv: query copies with shaders

Merged Lionel Landwerlin requested to merge llandwerlin/mesa:review/anv-shader-query-copies into main

Implementing #5104 (closed)

The main reason is not only "lots of queries" but also the fact that the command stream is painfully not coherent with the rest of shader writes. Using a shader means we can be coherent with the rest of the transfer commands.

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