ENGCOM-3059: [Forwardport] fix #17582 ./bin/magento config:show fails with a fatal error #18295

 - Merge Pull Request #18295 from mage2pratik/magento2:2.3-develop-PR-port-17993
 - Merged commits:
   1. 20af5a9

Author: magento-engcom-team

app/code/Magento/Config/Console/Command/ConfigShow/ValueProcessor.php

@@ -97,7 +97,7 @@ public function process($scope, $scopeCode, $value, $path)
         $field = $configStructure->getElementByConfigPath($path);
 
         /** @var Value $backendModel */
-        $backendModel = $field && $field->hasBackendModel()
+        $backendModel = $field instanceof Field && $field->hasBackendModel()
             ? $field->getBackendModel()
             : $this->configValueFactory->create();