Backport of "gstdevicemonitor: added cleanup of signal handlers and hidden providers list" into 1.20
requested to merge tpm/gstreamer:backport-mr-2182-into-1.20-gstdevicemonitor_add_cleanup_signal_handlers into 1.20
Backport of !2182 (merged) "gstdevicemonitor: added cleanup of signal handlers and hidden providers list".
Commits:
- cf684051 gstdevicemonitor: added cleanup of signal handlers and hidden providers list