Collect Course Blocks on Course Publish and Management Command

lms/djangoapps/course_api/blocks/tests/helpers.py

lms/djangoapps/course_blocks/__init__.py

lms/djangoapps/course_blocks/management/__init__.py

lms/djangoapps/course_blocks/management/commands/__init__.py

...urse_blocks/management/commands/generate_course_blocks.py

...oapps/course_blocks/management/commands/tests/__init__.py

.../management/commands/tests/test_generate_course_blocks.py

lms/djangoapps/course_blocks/signals.py

lms/djangoapps/course_blocks/tasks.py

lms/djangoapps/course_blocks/tests/__init__.py

lms/djangoapps/course_blocks/tests/helpers.py

lms/djangoapps/course_blocks/tests/test_signals.py

lms/djangoapps/course_blocks/transformers/tests/helpers.py

...overviews/management/commands/generate_course_overview.py

openedx/core/lib/block_structure/tests/helpers.py