Implement UI for uninstalling Cluster’s managed apps

What does this MR do?

Implements UI flow to uninstall managed applications in the Kubernetes Integration App. See &1201 (closed) for more information

Display a uninstall button if a managed application can be uninstalled

Once an application is installed and it is uninstallable, an "Uninstall" button will appear instead of an "Installed" one

Ask for uninstall confirmation

Indicating the consequences of uninstalling the application

Display uninstalling status

Notifies if the application was successfully uninstalled

With a toast 🥂

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Performance and testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Closes #60777 (closed)