In addition to the writable-workspace/ folder, we also need to re-create
the pavics-homepage/ layout.

To fix
```
DriverError: /notebook_dir/pavics-homepage/tutorial_data/test_regions.geojson: No such file or directory
```

Path to those .geojson files are hardcoded so users can copy the nb to
writable-workspace/ dir and still be able to run them seemlessly from
the Jupyter env (without having to also copy those *.geojson files with
the notebooks).

The layout creation will be delegated to pavics-landing repo so this
repo is generic.

…10705

…se testdata from prod

Add "TEST_USE_PROD_DATA" on any lines that we need to regex replace
"pavics" to "boreas".

For pavics-landing notebooks that use huge data from .ncml:
```
HTTPError: 404 Client Error:  for url: http://lvupavicsdev.ouranos.ca:8083/twitcher/ows/proxy/thredds/catalog/datasets/simulations/bias_adjusted/cmip5/ouranos/cb-oura-1.0/catalog.xml
```

Can not replicate all those .nc files that provides those .ncml.