Most SteamVR tools are broken

**Game information**
SteamVR is Valve's VR runtime.

**Distribution name and version where applicable**
Fedora 35 Workstation

**Flatpak info**
```
$ flatpak --version
Flatpak 1.12.7
$ flatpak --gl-drivers
nvidia-510-60-02
default
host
```

**Problem description**
SteamVR has some utilities for developers, from which `vrpathreg` does not work.
More info can be found [here](https://github.com/ValveSoftware/openvr/wiki/Local-Driver-Registration), altho on Linux its started by `vrpathreg.sh` from `/steamapps/common/SteamVR/bin` (SteamVR can not be installed separately from Steam)

And here is the actual problem:
```
$ ./vrpathreg.sh
Unable to read path registry
$ echo $?
255
```
Also if the Steam client's root directory is not symbolically linked to `~/.steam/root` it refuses to run at all. Most of open source SteamVR drivers rely on `~/.steam/root` for setup, pretty important to have imo.

Other utilities might be broken too, i just didn't get around to testing the others yet.

**Does this issue reproduce with native Steam**
No