feat: adds endpoint for downloading the taxonomy templates [FC-0036]

[pomegranited]

Description

This PR adds a Studio endpoint for downloading the CSV and JSON templates added to oel_tagging by openedx/openedx-learning#89

Will be used by Taxonomy Admins/Course Authors once the Taxonomy Admin UI is built.

Supporting information

Closes openedx/modular-learning#137
Private-ref: FAL-3520

Testing instructions

Using this branch in your devstack's cms-shell:

1. Update requirements: paver install_prereqs
2. Update migrations: ./manage.py lms migrate
3. Download the template files:
   http://localhost:18010/api/content_tagging/v1/taxonomies/import/template.csv
   http://localhost:18010/api/content_tagging/v1/taxonomies/import/template.json
4. Check that the files download as expected.

Deadline

None

[openedx-webhooks]

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[rpenido]

@pomegranited Good work here! 👍

• I read through the code
• I tested this: I read through the tests to make sure it covers the cases. I ran the migrations and test.

Nit: There is a typo in the Testing Instructions. The second link should be: http://localhost:18010/api/content_tagging/v1/taxonomies/import/template.csv

We have a failed test, but it seems that it is related to the runner:

The self-hosted runner: edx-platform-openedx-ci-runner-deployment-7xdl7-n5s2j lost communication with the server. Verify the machine is running and has a healthy network connection. Anything in your workflow that terminates the runner process, starves it for CPU/Memory, or blocks its network access can cause this error.

It would be good to trigger the CD/CI again (pushing an empty commit or updating the branch).

[openedx-webhooks]

@pomegranited 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[bradenmacdonald]

@rpenido There's no need to push again - the GitHub UI has a button to re-try the failed tests.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX staging environment in preparation for a release to production.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX production environment.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX production environment.