["FEAT"] add a querystring param that forces the reload

[felipemontoya]

Is your feature request related to a problem? Please describe.
I'm often doing changes in sites that are not rendered because of the cache.
Cache is very necessary for perfomance but the only solutions that I have now are: waiting 5 minutes or restarting the server.

Describe the solution you'd like
when I have a site like: https://lms.olive.albacore.felipemontoya.co/dashboard
I would like to be able to call: https://lms.olive.albacore.felipemontoya.co/dashboard?eox_tenant=cleancache

or something similar and have the signal process this diferentely at:
https://github.com/eduNEXT/eox-tenant/blob/master/eox_tenant/signals.py#L181

Describe alternatives you've considered
Reset the thread where the process is running, but I don't know always which POD of the cluster is running.

Additional context
In the saas variant this is not so important because the cache busts when the process is a different one and thus is always breaking the cache for small test sites. The issue becomes more prominent in stratus like sites.

[JuanDavidBuitrago]

@santiagosuarezedunext, could you check this?

Thanks for your feature request @felipemontoya

[santiagosuarezedunext]

I think that this is something annoying not just for us, for our clients too. We can implement a simple solution but it has to be automatic and have to work to our SaaS service too.
I will move this issue to prioriticed and we are goint to take it in the following sprints, we can discuss the detail of the implementation in that moment