Support report extension status event and send out

[ZhidongPeng]

• Extend event_logger.rs and telemetry.rs to able write extension status event to events folder with different file name pattern
• Extend event_reader.rs to read/process extension status events
• Added more tests to cover extension status events and mixed types of events.
• Added ExtensionEvent(TelemetryExtensionEventsEvent) into enum TelemetryEvent
• Fixed the missing fields from TelemetryGenericLogsEvent::to_xml_event
• GPA to start 2 async tasks to read generic events and extension status events
• GPA status loop to use report_extension_status_event
• Replace misc_helper::get_current_version with current_info::get_current_exe_version at logging and events
• Fixed the test server_mock to use an ephemeral port if the port is already in use, also returns the actual-binding port to the caller