Set up service provider for atlas-service service following tech design and convert plugins to use it instead of direct access. Following plugins will need to be updated:
@mongodb-js/compass-aggregations
@mongodb-js/compass-home
@mongodb-js/compass-query-bar
@mongodb-js/compass-settings
Separate AtlasService interface definition from AtlasService implementation
Split platform specific http client and auth flow handler from the service methods that will be completely shared between compass and data-explorer