[EPIC] Authorization service for SAVE cloud

[orchestr7]

Need to create a service that will unify all authorisation logic: for backend, sandbox and other future tools.

[orchestr7]

@kgevorkyan as I can see - we already do it with api-gateway. Do you remember the problem?

[kgevorkyan]

The main logic was implemented long time ago, also we extract all our auth logic into the separate module auth-service,

However, now it's not really the service. Someday we planned to make the real service, to which all of our components will address to, when they need the auth.

It's kind of big task, and my investigations gave no valuable results, the are several approaches how we can do it, e.g. with help of dex, but there is too little amount of documentation, so it was postponed

Actually, I don't know, will we do it at all one day or not

It also could be connected with #1247 and #1238

[nulls]

Will be partially implemented by #2336

[nulls]

Implemented in api-gateway without database (still in backend)