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mesa/zink: max-image limits

Erik Faye-Lund requested to merge kusma/mesa:zink-max-image-requirements into main

Both the GL frontend and Zink is playing a bit fast and loose with the max image sizes. This makes things a bit more strict, so we don't accidentally expose too high of a GL version on layered drivers. We also update the docs while we're at it.

This also adds some patches for the D3D12 and Freedreno drivers to prevent regressing the supported GL version. Other HW drivers have been checked, and shouldn't regress AFAICT.

This is an alternative to dropping the corresponding requirements from the Vulkan Profile in !19779 (merged).

Edited by Erik Faye-Lund

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