ARM64 support for jupyter images

[misohu]

Context

Upstream now supports Docker image builds for different platforms namely:

• x86_64
• aarch64
• ppc64le

This is reflected with:

• the usage of s6 overlay e.g. here
• upgrade of miniforge e.g. here
• usage of mamba for installing some ml librarries e.g. here

All these changes can be seen in in branch v1.8-branch namely:

• in base image
• in every jupyter image

IMPORTANT: our main branch is no longer compatible with upstream repo. We cannot rebuild the rocks without problems. I am talking more about this here.

What needs to get done

Rewrite the rockcraft.yaml files for each notebook image:

1. Upgrade python, miniforge and all the other requirements. Please note that some of them are no longer part of requirements.txt files.
2. Use mamba to install some of the ML librarries.
3. Use s6 overlay in the rockcraft.yaml.
4. Adjust the CI so we can build rocks for different platforms (x86_64, aarch64, ppc64le)

Definition of Done

1. We can rebuild Rocks from upstream branches
2. We have rocks for different platforms published in Dockerhub
3. CI is correctly handling tests and publishing

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The internal ticket has been created: https://warthogs.atlassian.net/browse/KF-5466.

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