[PATCH 0/3] MR9540: win32u/tests: Set GL_DEDICATED_MEMORY_OBJECT_EXT on import.

[Rémi Bernon]

Supersedes https://gitlab.winehq.org/wine/wine/-/merge_requests/9526 with stylistic fixups.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9540