WS-639: make carta open single image on start up

.../cli/executables/pexable/carta_envoy/carta_envoy/carta.py

...li/executables/pexable/carta_envoy/carta_envoy/connect.py

apps/cli/executables/pexable/carta_envoy/test/test_carta.py

apps/cli/utilities/aat_wrest/aat_wrest/metadata_wrester.py

apps/cli/utilities/aat_wrest/aat_wrest/wrest.py

apps/cli/utilities/aat_wrest/test/test_aat_wrest.py

schema/versions/80fc6e30540a_.py

schema/versions/8579a83e4575_single_image_carta.py

.../workspaces/workspaces/workflow/services/workflow_info.py

...rkspaces/workspaces/workflow/services/workflow_service.py