Change AdminRouterSubscriber::getSymfonyControllerFqcn so it generates relative paths.

	Change the behavior of "\EasyCorp\Bundle\EasyAdminBundle\EventListener\AdminRouterSubscriber::getSymfonyControllerFqcn"
	to generate relative path instead of absolute, so it is compatible with applications running behind a proxy with a
	path prefix (AKA sub-folder, sub-url or sub-path - using the HTTP header "x-forwarded-prefix").

Author: pacproduct

src/EventListener/AdminRouterSubscriber.php

@@ -289,7 +289,7 @@ private function getSymfonyControllerFqcn(Request $request): ?string
     {
         $routeName = $request->query->get(EA::ROUTE_NAME);
         $routeParams = $request->query->all()[EA::ROUTE_PARAMS] ?? [];
-        $url = $this->urlGenerator->generate($routeName, $routeParams);
+        $url = $this->urlGenerator->generate($routeName, $routeParams, UrlGeneratorInterface::RELATIVE_PATH);
 
         $newRequest = $request->duplicate();
         $newRequest->attributes->remove('_controller');