fix(experimental-utils): add name property to test case interface (#4067)

Author: G-Rath

packages/experimental-utils/src/ts-eslint/RuleTester.ts

@@ -9,6 +9,10 @@ import {
 } from './Rule';
 
 interface ValidTestCase<TOptions extends Readonly<unknown[]>> {
+  /**
+   * Name for the test case.
+   */
+  readonly name?: string;
   /**
    * Code for the test case.
    */