So the provides of python is clearly a problem. But nonethless: this won't change for leap 42.3 as it would open the too big can of worms. For 42.3 the only option is changing the require in texlive to /usr/bin/python - for tumbleweed I think these scripts are already gone? If not, using /usr/bin/python3 in the script and as require is the road to go.