[PM-23062] Fix extra signalr connections (#15432)

* Add `globalEnvironment$` property to `EnvironmentService`

* Update `ConfigService` to emit less and have higher quality fallbacks when no user config is available

* Remove debug code

* Fix strict null problems

libs/common/src/platform/services/config/config-api.service.ts

@@ -10,7 +10,7 @@ export class ConfigApiService implements ConfigApiServiceAbstraction {
     private tokenService: TokenService,
   ) {}
 
-  async get(userId: UserId | undefined): Promise<ServerConfigResponse> {
+  async get(userId: UserId | null): Promise<ServerConfigResponse> {
     // Authentication adds extra context to config responses, if the user has an access token, we want to use it
     // We don't particularly care about ensuring the token is valid and not expired, just that it exists
     const authed: boolean =