feat: update charm 1.8.0-rc.0

[NohaIhab]

Summary of changes

• Bump image version to v1.8.0-rc.0 in preparation for the 1.8 release based on kubeflow/manifests repo tag v1.8.0-rc.0.
• Remove unused profiles resource from Auth manifests, this resource was needed for creating the admin profile, which is no longer applicable.
• Set the newly added POD_NAMESPACE env var, for context see the issue Discuss deployment in non-kubeflow namespace bundle-kubeflow#698

[DnPlas]

Thanks @NohaIhab !

I think we are also missing the following env variables on the pebble layer:

• DASHBOARD_LINKS_CONFIGMAP
• POD_NAMESPACE - this one we can set it to self.model.name for now and leave a comment referencing Discuss deployment in non-kubeflow namespace bundle-kubeflow#698, even if we don't fully support changing the namespace atm, we will be prepared.

[NohaIhab]

• DASHBOARD_LINKS_CONFIGMAP

@DnPlas due to this issue kubeflow/kubeflow#6622 we are setting the DASHBOARD_CONFIGMAP env variable instead

kubeflow-dashboard-operator/src/charm.py

Line 171 in 7ea87c4

"DASHBOARD_CONFIGMAP": self._configmap_name,

the issue is still valid in 1.8.0-rc.0, see here

[DnPlas]

Thanks @NohaIhab