Course-level lesson drip

[brianhogg]

Description

Adds an option to enable lesson drip on the course level. When enabled, lesson drip settings are disabled in favour of the course-level ones.

How has this been tested?

Manually and with unit tests.

Screenshots

Course-level drip settings in the Restrictions tab.

Edit Lesson drip settings message when course-level drip is disabled.

Edit Lesson drip settings message when course-level drip is enabled.

Course builder lesson edition message when course-level drip is disabled.

Course builder lesson edition message when course-level drip is enabled.

Checklist:

• [x] This PR requires and contains at least one changelog file. <!-- To create a changelog yml file: npm run dev changelog add -- -i and follow the prompt. See also: https://github.com/gocodebox/lifterlms/blob/trunk/packages/dev/README.md#changelog-add -->
• [x] My code has been tested.
• [x] My code passes all existing automated tests.
• [x] My code follows the LifterLMS Coding & Documentation Standards.