SiteSync: host dirmap is not working properly (#4563)

- only editable keys are returned from Site Sync module to Local Settings

Cleaner approach even if LS UI is going away in Ayon.

- use remote_site only if is local_drive provider

- remove unwanted import

- cache mapping, update logging

Mapping was called multiple times for Nuke.
Logging was too verbose.

openpype/tools/settings/local_settings/projects_widget.py

@@ -272,7 +272,7 @@ class SitesWidget(QtWidgets.QWidget):
         )
 
         site_configs = sync_server_module.get_all_site_configs(
-            self._project_name)
+            self._project_name, local_editable_only=True)
 
         roots_entity = (
             self.project_settings[PROJECT_ANATOMY_KEY][LOCAL_ROOTS_KEY]