[civiremote_entity] Stay on form page in case of error

Previously on error a redirect to the destination (URL parameter) was
executed, if given. Otherwise, a redirect to the form page was executed.
Now in both cases a redirect to the form page is executed, if Drupal >=
10 is used.

modules/civiremote_entity/src/Form/AbstractEntityForm.php

@@ -119,6 +119,10 @@ public function submitForm(array &$form, FormStateInterface $formState): void {
     }
     catch (ApiCallFailedException $e) {
       $this->messenger()->addError($this->t('Submitting form failed: @error', ['@error' => $e->getMessage()]));
+      if (method_exists($formState, 'setIgnoreDestination')) {
+        // Method is not available in Drupal 9.
+        $formState->setIgnoreDestination(TRUE);
+      }
 
       return;
     }