Load decoder.onnx only when necessary #12818

Job	Run time
search_cache / search_cache	2s
build	7m 0s
unit_testing	13m 20s
rest_api_testing	18m 7s
e2e_testing (actions_tasks)	13m 3s
e2e_testing (actions_tasks2)	20m 11s
e2e_testing (actions_tasks3)	15m 55s
e2e_testing (actions_objects)	10m 8s
e2e_testing (actions_objects2)	10m 59s
e2e_testing (actions_users)	8m 12s
e2e_testing (actions_projects_models)	10m 3s
e2e_testing (canvas3d_functionality)	8m 26s
e2e_testing (canvas3d_functionality_2)	7m 28s
e2e_testing (issues_prs)	11m 40s
e2e_testing (issues_prs2)	12m 34s
e2e_testing (features)	11m 54s
codecov	20s
generate_github_pages	2m 59s
publish_dev_images	0s
	3h 2m 21s

Provide feedback