Fix segmentation fault and performance issue with Debian Trixie (13) vs_client_linux-x64_1.21.1

[0gladih]

I upgraded from Debian Bookworm to Trixie.

If you use release 1.21.1 out of the box, then a segmentation fault is issued after world loading.

The problem is in line 9 of the `run.sh` script:

export DRI_PRIME=1

If you remove the line, then the game becomes sluggish.

Instead, replace line 9 with:

export __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia

HTH.