In this diff, we initialize the static configuration as a struct for the internal notifications library to avoid passing repeated parameters on every notification-sending call. We are using a lazy static initialization and parameters from the Tunnelbroker's configuration file.
This diff is related to the abandoned D5329. The static configuration is used in the D5642 diff updates.

Linear task: ENG-1737

1. Service is successfully built.
2. The diff D5641 where the function is used the service is successfully built.