Upgrading test+devel environments

See merge request !32

Upgrading eosc images with user sharing extension + enabling user-initiated sharing on staging

See merge request !31

Upgrading to Hub 5 + enabling RTC on stage

See merge request !28

Adding further updates for Hub 5 upgrade + RTC on testing/devel

See merge request !29

Upgrading to Jupyterhub 5 on devel and testing environtment

See merge request !27

* ENVRI-Hub NEXT logo
* replace texts in templates from EGI Notebooks:
  * "EGI Notebooks" -> "ENVRI-Hub VRE"
  * "EGI" -> "ENVRI-Hub NEXT"

Upgrade versions - k8s 1.31.2, jupyterhub 4.1.6

See merge request !25

The problem has been on clusters with public IP addresses on the nodes. The
added policy will explicitly allow connecting to cluster ingress service.

Needed for testing from within notebooks and for collaborative feature.

* glpi
* fluent-bit
* deepfence

* k8s + system components
* calico
* helm
* prometheus
* grafana

* ansible linting
* ansible block error handling
* YAML linting
* editorconfig file and formatting

Separare deployment of notebooks and monitoring.