WS-607, WS-620: carta workflow templates and carta envoy conversion

apps/cli/executables/pexable/carta_envoy/README.md

...i/executables/pexable/carta_envoy/carta_envoy/__init__.py

...i/executables/pexable/carta_envoy/carta_envoy/_version.py

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

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

.../executables/pexable/carta_envoy/carta_envoy/launchers.py

.../executables/pexable/carta_envoy/carta_envoy/utilities.py

apps/cli/executables/pexable/carta_envoy/setup.py

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

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

.../cli/executables/pexable/carta_envoy/test/test_connect.py

...li/executables/pexable/carta_envoy/test/test_launchers.py

...li/executables/pexable/carta_envoy/test/test_utilities.py

schema/versions/113e96b85a70_add_carta_workflow.py

schema/versions/81679be895a6_.py

services/workflow/bin/run-tests.sh

services/workflow/requirements.txt