Maybe hard coding the python version in the operator is not the best idea

In a recent fix for #4500 you changed the operator genereated script from using hard coded paths with python3.11 to python3.12.  
Is it really necessary to hard code any python version in that script?

I suggest something like this:
```bash
PGADMIN_DIR=$(python3 -c "import pgadmin4; print(pgadmin4.__spec__.submodule_search_locations[0])")
``` 
