Guest accounts feature (#11428)

* MM-14139: Creating permissions for invite/promote/demote guests (#10778)

* MM-14139: Creating permissions for invite/promote/demote guests

* Fixing tests

* Adding invite guest api endpoint (#10792)

* Adding invite guest api endpoint

* Adding i18n

* Adding some tests

* WIP

* Migrating Token.Extra info to bigger size (2048)

* Fixing tests

* Adding client function for invite guests

* Adding send guests invites tests

* Renaming file from guest to guest_invite

* Adding Promote/Demote users from/to guest endpoints (#10791)

* Adding Promote/Demote users from/to guest endpoints

* Adding i18n translations

* Adding the client functions

* Using getQueryBuilder function

* Addressing PR review comments

* Adding default channels to users on promte from guest (#10851)

* Adding default channels to users on promte from guest

* Addressing PR review comments

* Fixing merge problems

* Sending websockets events on promote/demote (#11403)

* Sending websockets events on promote/demote

* Fixing merge problems

* Fixing govet shadowing problem

* Fixing feature branch tests

* Avoiding leaking users data through websockets for guest accounts (#11489)

* Avoiding leaking users data through websockets for guest accounts

* Adding tests and fixing code error

* Fixing i18n

* Allow to enable/disable guests and other extra config settings (#11481)

* Allow to enable/disable guests and other extra config settings

* Fixing tests and moving license and config validation to api level

* Update api4/role_test.go

Co-Authored-By: George Goldberg <george@gberg.me>

* Update api4/role_test.go

Co-Authored-By: George Goldberg <george@gberg.me>

* Fixing typo

* fixing tests

* Managing correctly the guest channel leave behavior (#11578)

* MM-15134: Removing guests from teams or system on leave channels if needed

* WIP

* No deactivating the guest user when leave the last team

* Adding a couple of tests

* Fixing shadow variables

* Fixing tests

* fixing tests

* fixing shadow variables

* Adding guest counts for channel stats (#11646)

* Adding guest counts for channel stats

* Adding tests

* Fixing tests

* Fixing guest domain restrictions (#11660)

* Adding needed migration for the database

* Fixing migration

store/sqlstore/session_store.go

@@ -206,6 +206,23 @@ func (me SqlSessionStore) UpdateDeviceId(id string, deviceId string, expiresAt i
 	return deviceId, nil
 }
 
+func (me SqlSessionStore) UpdateProps(session *model.Session) *model.AppError {
+	oldSession, appErr := me.Get(session.Id)
+	if appErr != nil {
+		return appErr
+	}
+	oldSession.Props = session.Props
+
+	count, err := me.GetMaster().Update(oldSession)
+	if err != nil {
+		return model.NewAppError("SqlSessionStore.UpdateProps", "store.sql_session.update_props.app_error", nil, err.Error(), http.StatusInternalServerError)
+	}
+	if count != 1 {
+		return model.NewAppError("SqlSessionStore.UpdateProps", "store.sql_session.update_props.app_error", nil, "", http.StatusInternalServerError)
+	}
+	return nil
+}
+
 func (me SqlSessionStore) AnalyticsSessionCount() (int64, *model.AppError) {
 	query :=
 		`SELECT