OpenGL cores cannot change framebuffer size at runtime

[celerizer]

Attempting to increase internal resolution at runtime results in an incorrectly scaled image, as only the space previously defined can be used

2023-12-23.11-48-20.mp4

[celerizer]

ed4b243 Fixed this for Citra and Dolphin, but PCSX2 and Flycast still exhibit the recorded behavior.