WSOD on edit custom font [#3427476]

Problem/Motivation

When used with another contrib module like responsive_preview, clicking Edit or Delete on a custom font triggers WSOD.

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.local_font_config_entity.canonical" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 206 of core/lib/Drupal/Core/Routing/RouteProvider.php).

The local_fonts entity canonical link is defined but not a corresponding route. When another module calls something like $entity->toUrl() it fails.

Steps to reproduce

Use Drupal 10.2.4, fontyourface 4.0.0 and responsive_preview
Enable local_fonts module
Create and upload a local font
Click Edit or Delete

Proposed resolution

Remove the local_fonts entity canonical link.

Issue fork fontyourface-3427476

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3427476-wsod-on-edit changes, plain diff MR !8
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