Nvidia enviroment config update(WLR_NO_HARDWARE_CURSORS deprecation + hardware cursor issue is fixed)

Starting from Hyprland 0.4x NVIDIA hardware cursor issues is solved, there is no need to pass WLR_NO_HARDWARE_CURSORS also this option is deprecated now and replaced by cursor:no_hardware_cursors (if someone still wants to use it).

WLR_NO_HARDWARE_CURSORS can be safely removed from nvidia.conf environment variables since the underlying issue is solved and this option is now ignored anyway.

REF: https://wiki.hyprland.org/Nvidia/#how-to-get-hyprland-to-possibly-run-on-nvidia-proprietary

I'm on NVIDIA and can confirm that WLR_NO_HARDWARE_CURSORS can be removed now.