Work around the current Metal renderer's broken resolution scaling

[GreemDev]

Simply clamps the chosen res scale to 1x if the renderer (after Auto detection) is Metal.

[github-actions]

Download the artifacts for this pull request:

• ryujinx-Release-1.2.0+fb86059-linux_arm64
• ryujinx-Release-1.2.0+fb86059-linux_arm64-AppImage
• ryujinx-Release-1.2.0+fb86059-linux_x64
• ryujinx-Release-1.2.0+fb86059-linux_x64-AppImage
• ryujinx-Release-1.2.0+fb86059-macos_universal
• ryujinx-Release-1.2.0+fb86059-win_x64

Only for Developers

• ryujinx-Debug-1.2.0+fb86059-linux_arm64
• ryujinx-Debug-1.2.0+fb86059-linux_arm64-AppImage
• ryujinx-Debug-1.2.0+fb86059-linux_x64
• ryujinx-Debug-1.2.0+fb86059-linux_x64-AppImage
• ryujinx-Debug-1.2.0+fb86059-macos_universal
• ryujinx-Debug-1.2.0+fb86059-win_x64

[GreemDev]

The renderer itself doesn't have the issue, some games do, specifically Unity ones.
This does not solve the issue, it just prevents scaling that works in most games from being used.
Closing.