Handle incompatible Factories between Che 6 and Che 7

[slemeur]

Description

Not all the factories will be compatible between Che 6 and Che 7.
We need to handle that properly and provide a clear message to the end-user.

When a user is starting a factory that is incompatible
Display an error message on the loader, explaining the factory must be converted to Che 7 based factories and a link to the documentation.
We should also provide a way to the user to continue the process manually:

• We will preselect the project to be cloned
• We will redirect the user into the workspace creation page, where he'll be able to choose a stack and move forward.

In the list of factories on the dashboard
We should display an indicator on the factories that are not compatible and include a link on how to move to the new definition.

[olexii4]

It depends on che#13381