nle: Some tests can take a lot of time running under valgrind
The following test playback the pipeline for a bit of time and can randomly timeout on CI when running under valgrind:
- check.gst-editing-services.nle_nleoperation.test_pyramid_operations_expandable
- check.gst-editing-services.nle_nleoperation.test_complex_operations
- check.gst-editing-services.nle_nleoperation.test_pyramid_operations
- check.gst-editing-services.nle_nleoperation.test_pyramid_operations2
- check.gst-editing-services.nle_complex.test_one_above_another