UAI dashboard - unenrolled module card changes

[gumaerc]

What are the relevant tickets?

https://github.com/mitodl/hq/issues/7255

Description (What does it do?)

This PR solves the first two items in the above issue:

• The DashboardCard context menu is now hidden if enrollment.status is not either EnrollmentStatus.Completed or EnrollmentStatus.Enrolled
• The new unenrolled status indicator was added

Screenshots (if appropriate):

How can this be tested?

• Ensure that you have a Posthog project configured and have run the basic setup for mit-learn
• Enable both the enrollment-dashboard and mitlearn-organization-dashboard feature flags
• Visit the dashboard at http://open.odl.local:8062/dashboard (or wherever your site is hosted), logging in if necessary
• The "My Learning" dashboard should be unchanged by this PR
• Click either "Organization X" or Organization Y" to open the UAI dashboard
• Ensure that on unenrolled modules, you see the new filled grey circle status indicator
• Ensure that the context menu (3 dots) are hidden on unenrolled modules

[github-actions]

OpenAPI Changes

Show/hide No detectable change.

[github-actions]

OpenAPI Changes

Show/hide No detectable change.

[shanbady]

LGTM 👍