Allow admins to reset app state for private listings

Problem Definition

Due to this, if a user tries to use a private listing to install an app that was already previously installed in an instance, they will face an error saying the app can't be installed.

Suggested Solution

Allow the instance's admin to reset the app's state so the app can be installed again.

Workaround

Contact support through https://support.atlassian.com/contact mentioning the app's name and this report: CONFCLOUD-75777