Show required fields when configuring protocol mappers

Closes #40619

Signed-off-by: Alexander Schwartz <aschwart@redhat.com>

js/apps/admin-ui/src/components/dynamic/StringComponent.tsx

@@ -17,6 +17,12 @@ export const StringComponent = ({
       label={t(label!)}
       labelIcon={t(helpText!)}
       data-testid={name}
+      rules={{
+        required: {
+          value: !!props.required,
+          message: t("required"),
+        },
+      }}
       {...props}
     />
   );