Add group partitions information to user metadata in the dom.

common/lib/xmodule/xmodule/partitions/partitions_service.py

...oapps/course_blocks/transformers/tests/test_split_test.py

lms/djangoapps/course_blocks/transformers/user_partitions.py

lms/djangoapps/courseware/tests/test_course_info.py

lms/djangoapps/courseware/tests/test_views.py

lms/djangoapps/experiments/utils.py

lms/templates/user_metadata.html

...ures/course_experience/tests/views/test_course_updates.py