1. update query counts with more accuracy
2. don't use defaultdict in block_structure

* mattdrayer: Add helpers.get_value test
* mattdrayer: Change to simpler implementation, per @douglashall
* mattdrayer: Address quality violations and test failures

* mattdrayer: Add helpers.get_value test
* mattdrayer: Change to simpler implementation, per @douglashall
* mattdrayer: Address quality violations and test failures

When program detail pages are enabled, cards on the listing page will link to their respective detail pages. Includes extensive cleanup of program listing tests. ECOM-4227.

ECOM-4653

ECOM-4729

Retrieving the URL from settings rather than an OAuth client that might not exist.

ECOM-4729

This commit "undoes"a previous hotfix, and allows a cms course_publish
signal to trigger a block_structure update_course_in_cache task, which
is run on an lms worker queue.

Changes:
    -exposes ALTERNATE_QUEUE_ENVS
    -adds routing layer in celery.py
    -moves prior dev_with_worker settings file to devstack_with_worker
    -moves course_block api functionality into openedx/core/djangoapps/content/block_structure

ECOM-4653

These changes improve the performance of the LMS' program certification task. They also reduce strain on the programs service, especially when attempting to award program certificates to large numbers of students. ECOM-4490.

ECOM-2361

The supplemented data is passed through to the program details page. Part of ECOM-4415.

TNL-4449

Uses the view's ID argument to retrieve and drop unmodified programs API data on the details page. Future work will supplement with CourseOverviews data. Part of ECOM-4415.

This will be used to retrieve data for the program detail page. Part of ECOM-4415.

ECOM-4398