Less computation on notebooks

[RondeauG]

Pull Request Checklist:

• This PR addresses an already opened issue (for bug fixes / features)
  • This PR fixes #xyz
• (If applicable) Documentation has been added / updated (for bug fixes / features).
• (If applicable) Tests have been added.
• CHANGELOG.rst has been updated (with summary of main changes).
  • Link to issue (:issue:number) and pull request (:pull:number) has been added.

What kind of change does this PR introduce?

• Reduces the computation needed by the notebooks. Notably:
  • The modelling notebook now gets its data from xhydro-testdata instead of using xdatasets/planetary-computer.
  • The local frequency analysis notebook is done on 2 stations instead of 5.
  • The regional analysis notebook is done on 15 stations instead of 25. Only annual maximums are used.
  • The uncertainty analysis is done using 35 bootstraps instead of 200.

Does this PR introduce a breaking change?

Other information:

[review-notebook-app]

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[RondeauG]

@sebastienlanglois Aurais-tu une idée de ce qui plante actuellement dans le module gis? Tout passait correctement il y a trois jours (e.g. #209) et je vois très peu de changements dans les environnements. J'ai fait quelques tests localement, mais je ne trouve pas...

[sebastienlanglois]

Oui, il semble que le Planetary Computer ont bloqué l'accès à leur stockage via http depuis hier. Il existe un fix où il faut demander un SAS token afin que l'url soit sécurisé, mais a priori avec cette approche, ça devrait réparer le module. Je vais implémenter un fix d'ici demain et pousser une PR.

[Zeitsperre]

@sebastienlanglois If we want to add a token to the repository secrets as an environment variable, this can be easily done for both GitHub and ReadTheDocs. Contact me if you're interested in that approach.

[sebastienlanglois]

@Zeitsperre @RondeauG I have implemented the fix for the GIS module here : #213

[Zeitsperre]

LGTM, but wait for @sebastienlanglois's approval

[sebastienlanglois]

LGTM