multi-tenancy

Proposed behavior
sqlsrv driver

Current behavior
mysql and postgreslq drivers

We should update the k0s, k3s & k8s versions for v1.21, v1.22, v1.23 & v1.24 here

As #596 is completed, the new metrics exported by the Capsule Proxy must be exposed in a Grafana dashboard in order to provide more visibility on this component.

Let's evaluate if using a new dashboard, or rather, the Capsule one.

Why CubeOptions need validation?
Before running KubeCube, we are supposed to doing options validate, quick exit if validate failed.

	Start = func(c *cli.Context) error {
		if errs := flags.CubeOpts.Validate(); len(errs) > 0 {
			return utilerrors.NewAggregate(errs)
		}

		run(flags.CubeOpts, signals.SetupSignalHandler())

		return nil
	}

How to do it?
We had validat

Add a method in the User model that allow invalidation the organizations cache of the user.

Possible Solution

# In openwisp_users.base.models.AbstractUser
def _invalidate_organization_organizations_dict(self):
     cache.delete('user_{}_organizations'.format(self.pk))
     try:
        del user.organizations_managed
    except AttributeError:
        pass
    try: