[ENG-8975] Redirect addons support

[futa-ikeda]

• Ticket: [ENG-8975]
• Feature flag: n/a

Purpose

• Provide support for redirect services (port of this ember PR )

Summary of Changes

• Add redirect addon model
• Add new service type to existing addons enums, code, etc
• Moved the following features behind the gravy__redirect feature flag
  • Add support for finding redirect addon types on the addons page
  • Update addon terms page to handle redirect to redirect addon URL

Screenshot(s)

If you have the feature flag gravy_redirect active, you will see the option to view redirect services from GravyValet, otherwise this page will not look any different

When clicking into a redirect service's addon card, the Addons Terms page has been updated to show "Go to {ServiceName}" button, which should open a popup window that will take users to the URL shown at the bottom of the screen, as well as a link in the description that will take user to the same place in case the popup window is blocked

Side Effects

QA Notes

[futa-ikeda]

Needs to be released in tandem with this GV feature: CenterForOpenScience/gravyvalet#335

The base branch was changed.

[brianjgeiger]

@futa-ikeda Looks like there are some conflicts that need resolving.

[nsemets]

Will it be added in near future?

[futa-ikeda]

This should be addressed once we have deployed this to production and have confirmed with our external partners that things are working as expected for them on the production environment. I will make a separate ticket in Jira to clean up this feature-flagging logic

[futa-ikeda]

Jira ticket to remove feature flag logic is ENG-9787