Refactor metrics handling and improve logging

- Removed the MetricsManager initialization from `run_helper.py` to avoid duplication, as metrics are now handled in `main.py`.
- Updated logging levels in `server_prometheus.py` and `metrics_middleware.py` to use debug instead of info for less critical messages.
- Added metrics configuration to `BaseDependencyFactory` for better management of metrics settings.
- Deleted the obsolete `metrics_exporter.py` file to streamline the codebase.
- Updated various tests to reflect changes in the metrics handling and ensure proper functionality.

helper_bot/utils/base_dependency_factory.py

@@ -43,6 +43,11 @@ class BaseDependencyFactory:
             'test': self._parse_bool(os.getenv('TEST', 'false'))
         }
 
+        self.settings['Metrics'] = {
+            'host': os.getenv('METRICS_HOST', '0.0.0.0'),
+            'port': self._parse_int(os.getenv('METRICS_PORT', '8080'))
+        }
+
     def _parse_bool(self, value: str) -> bool:
         """Парсит строковое значение в boolean."""
         return value.lower() in ('true', '1', 'yes', 'on')