Revert "Remove NVIDIA Flatpak Workaround"

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Description

This reverts commit 5fcd13efe174a9512e9e67b7462aa2f648e170cf (#3726).

The NVIDIA Flatpak driver has reverted its GL32 extension changes (flathub/org.freedesktop.Platform.GL.nvidia#350) which in turn requires the original workaround from 5627b5b7cc5ad2666391daf5db0c8a707af14c7f.

Other references: flathub/org.freedesktop.Platform.GL.nvidia#112 and flathub/org.freedesktop.Platform.GL.nvidia#331

Type of change

• [X] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

In the debug information, under Graphics -> vendors -> nvidia -> icd, there will be a list of Vulkan .json files.

• [X] Using the latest version of Bottles from Flathub shows only the x86_64 file
• [X] Using my branch's build of Bottles still shows only the x86_64 file