[MICROBA-437] Add api to determine demographics status based on user data

lms/envs/common.py

lms/urls.py

openedx/core/djangoapps/demographics/README.rst

openedx/core/djangoapps/demographics/__init__.py

openedx/core/djangoapps/demographics/api/status.py

...aphics/docs/decisions/0001-demographics-djangoapp-api.rst

openedx/core/djangoapps/demographics/rest_api/__init__.py

openedx/core/djangoapps/demographics/rest_api/urls.py

openedx/core/djangoapps/demographics/rest_api/v1/__init__.py

openedx/core/djangoapps/demographics/rest_api/v1/urls.py

openedx/core/djangoapps/demographics/rest_api/v1/views.py

openedx/core/djangoapps/demographics/tests/__init__.py

openedx/core/djangoapps/demographics/tests/test_status.py

openedx/core/djangoapps/programs/tests/test_utils.py

openedx/core/djangoapps/programs/utils.py

openedx/tests/settings.py