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Workaround for Access Violation startup crash on deprecated Radeon GPUs on Windows

This is a workaround for T80804.

There's a startup crash that happens on 2.91.0 on Windows, an `EXCEPTION_ACCESS_VIOLATION`
on `atio6axx.dll`. It is triggered by `glClear` on the `detect_mip_render_workaround`
function. The workaround moves the function after the device/driver workaround section and
sets the flag to the affected one to avoid running the check.

It is deprecated hardware that has not meet the minimum requirements since 2.79, but is
still usable and this extends its usability a bit before the cards are finally blacklisted.

Reviewed By: Jeroen Bakker

Differential Revision: https://developer.blender.org/D9667