Willo: Allow teachers to back of out integration

Description

Allow teachers to back out of a Willo integration manually if they select the wrong course, and decide if we can/should add controls to a teacher's UI that allow them to undo an integration.

Acceptance

Admin can unpair a Willo integrated course from a Tutor course
CS can walk instructor through what will happen if we back him/her out of an integration
Decision on whether to add additional admin controls on the teacher interface for undoing LMS integration

Checklist for Done

1A-DEFINE

[x] Description is complete
[x] High-level natural language acceptance tests are complete
~If UX design is needed then the UX label is added~
~If UX design is needed then the UX LoFi Design is completed, approved by the Product Manager, and added to the issue.~
~A high-level solution (development approach for the code change) is added to the issue~
[x] If prototype code is generated, it is linked to the issue.
[x] If tech briefs are generated, they are linked to the issue.

1B-DECOMP

[x] The work is broken into reasonable and consistent work items, and work item issues created. The work item issues are moved below the Done marker in the Decomp column.
[x] Estimate is updated for the work item issues.
[x] If there is a parent story epic issue, it is linked with the child work item issues and moved to the Epic column.
[x] If an issue is included in a product phase, then Release is selected.

1C-DESIGN

~The UX HiFi Design is complete, approved by the Product Manager, and added to the issue.~
~Distilled acceptance tests are added to the issue.~
~Automated testing criteria are added to issue.~
[ ] The solution is updated.

2A-CODE

[ ] A pull request is opened, the automated pull request checks pass, and the change has been approved by other developers.
[ ] The acceptance tests are finalized in "Given / When / Then" format.
[ ] Regression test categories are identified on the issue. Categories should be referenced if any changes might affect them, even if the intended functionality is unchanged.

4A-UX REVIEW

[ ] The pull request is merged into master, and the change branch is deleted.

5A-FUNCT VER

[ ] All the acceptance tests for this issue pass.

5C-REGRESSION

[ ] The test plan in testrail passes.
[ ] Blessing from Product Manager that the release is good to go.

5D-READY TO BE DEPLOYED

[ ] Production is updated and verified.
[ ] All issues in the release are closed.

openstax / tutor-js

Willo: Allow teachers to back of out integration #2376

Description

Acceptance

Checklist for Done