feat: Add a csv report of xblocks used in courses (redwood)

[samuelallan72]

Description

Add a management command for generating a csv report of xblocks used in courses.

Usage (with common management command help removed for clarity):

$ python manage.py lms xblock_list_csv --help
...
usage: manage.py xblock_list_csv [-h] [--exclude-core-xblocks] [--version] [-v {0,1,2,3}] [--settings SETTINGS] [--pythonpath PYTHONPATH] [--traceback] [--no-color]
                                 [--force-color] [--skip-checks]
                                 filename

Generate a CSV file with all published components used in courses with their xblock type.

positional arguments:
  filename              Path to the CSV output file. Use '-' to print to stdout.

options:
  -h, --help            show this help message and exit
  --exclude-core-xblocks
                        Exclude components using core XBlocks: (html, problem, video). Default: false
...

Examples:

Print complete csv to stdout:

python manage.py lms xblock_list_csv - 

Save complete csv to components.csv:

python manage.py lms xblock_list_csv components.csv

Save csv excluding components using core xblocks to components.csv:

python manage.py lms xblock_list_csv --exclude-core-xblocks components.csv

Example csv output files:

components-excluded.csv
components.csv
components-stdout.csv

Supporting information

Private-ref: https://tasks.opencraft.com/browse/BB-10225

Testing instructions

• deploy this branch to a redwood devstack
• ensure there is a range of published course content across at least two courses on the devstack
• start an lms shell: tutor dev exec lms -- bash
• run python manage.py lms xblock_list_csv -
• verify the csv data is printed to the console
• run python manage.py lms xblock_list_csv components.csv
• verify the csv data is saved to components.csv
• run python manage.py lms xblock_list_csv - > components-stdout.csv
• run diff components.csv components-stdout.csv and verify the diff is empty (to verify printing to stdout has the same report as writing to file)
• verify components.csv contains rows as expected - check that all courses are included and the data makes sense
• run python manage.py lms xblock_list_csv --exclude-core-xblocks components-excluded.csv
• in components-excluded.csv, verify there are no rows for the core xblocks (html, problem, video)

[pkulkark]

LGTM 👍

• I tested this: I couldn't get my devstack running but verified the generated reports are as expected.
• I read through the code