Add delete routes and test structure for e2e tests

Dockerfile-Gunicorn

app/api/dependencies.py

app/api/endpoints/resource_version.py

app/api/endpoints/resources.py

app/api/utils.py

app/mako_templates/delete_resource.sh.tmpl

app/mako_templates/delete_resource_version.sh.tmpl

app/mako_templates/set_latest_resource_version.sh.tmpl

app/mako_templates/synchronize_resource_version.sh.tmpl

app/tests/api/test_resource.py

app/tests/api/test_resource_version.py

app/tests/conftest.py