Improve Docker image and conda installation

Adds several features to the Docker image and conda installation:

• cpl and python-cpl are now installed through conda, so no dependencies have to be installed through source anymore.
• micadopipeline is now also installed through conda, from the conda branch of the Micado-Pipeline project. This is not the latest version, because that one is not compatible with MicadoWISE.
• The docker image is ran as a regular user, not root.
• Everything is installed through mamba now whenever possible.
• Figure creation instabilities have been investigated (emacs should be installed.
• Several installation scripts have been cleaned up.