fix(console): fix self-management without explicit roles (#11583)

# Which Problems Are Solved

The self-management of user without any permissions in Console was no
longer possible and the UI was completely stuck.
This was due to the method `getActiveOrg`, which returned an error in
case no organization could be retrieved.

# How the Problems Are Solved

- Return `undefined` in case no organization is found and handle cases
where an organization is required.
- Redirect the user to `/users/me` if no organization is retrieved on
the start
- Prevent users without roles to access the home page

# Additional Changes

None

# Additional Context

closes #11567

console/src/app/services/grpc-auth.service.ts

@@ -197,7 +197,7 @@ export class GrpcAuthService {
     return this.grpcService.auth.listMyMetadata(req, null).then((resp) => resp.toObject());
   }
 
-  public async getActiveOrg(id?: string): Promise<Org.AsObject> {
+  public async getActiveOrg(id?: string): Promise<Org.AsObject | undefined> {
     if (id) {
       const find = this.cachedOrgs.getValue().find((tmp) => tmp.id === id);
       if (find) {
@@ -249,7 +249,7 @@ export class GrpcAuthService {
 
       if (orgs.length === 0) {
         this._activeOrgChanged.next(undefined);
-        return Promise.reject(new Error('No organizations found!'));
+        return undefined;
       }
 
       const orgToSet = orgs.find((element) => element.id !== '0' && element.name !== '');