test_runner: use validateStringArray for timers.enable()

`apis` which is argument of `timers.enable()` is string array.
So use `validatStringArray` instead of `validateArray`. And
`options` is optional, so update JSDoc.
In document, some default value of `timers` are missed such as
`setImmediate` and `clearImmediate`. Next, `milliseconds` which
is argument of `timers.tick() is optional and default is 1.

doc/api/test.md

@@ -1908,10 +1908,11 @@ mock.timers.enable({ apis: ['Date'], now: new Date() });
 
 Alternatively, if you call `mock.timers.enable()` without any parameters:
 
-All timers (`'setInterval'`, `'clearInterval'`, `'setTimeout'`, and `'clearTimeout'`)
-will be mocked. The `setInterval`, `clearInterval`, `setTimeout`, and `clearTimeout`
-functions from `node:timers`, `node:timers/promises`,
-and `globalThis` will be mocked. As well as the global `Date` object.
+All timers (`'setInterval'`, `'clearInterval'`, `'setTimeout'`, `'clearTimeout'`,
+`'setImmediate'`, and `'clearImmediate'`) will be mocked. The `setInterval`,
+`clearInterval`, `setTimeout`, `clearTimeout`, `'setImmediate'`, and
+`'clearImmediate'` functions from `node:timers`, `node:timers/promises`, and
+`globalThis` will be mocked. As well as the global `Date` object.
 
 ### `timers.reset()`
 
@@ -1942,7 +1943,7 @@ mock.timers.reset();
 
 Calls `timers.reset()`.
 
-### `timers.tick(milliseconds)`
+### `timers.tick([milliseconds])`
 
 <!-- YAML
 added:
@@ -1953,7 +1954,7 @@ added:
 Advances time for all mocked timers.
 
 * `milliseconds` {number} The amount of time, in milliseconds,
-  to advance the timers.
+  to advance the timers. **Default:** `1`.
 
 **Note:** This diverges from how `setTimeout` in Node.js behaves and accepts
 only positive numbers. In Node.js, `setTimeout` with negative numbers is

lib/internal/test_runner/mock/mock_timers.js

@@ -26,8 +26,8 @@ const {
 } = primordials;
 const {
   validateAbortSignal,
-  validateArray,
   validateNumber,
+  validateStringArray,
 } = require('internal/validators');
 
 const {
@@ -641,7 +641,7 @@ class MockTimers {
    */
   /**
    * Enables the MockTimers replacing the native timers with the fake ones.
-   * @param {EnableOptions} options
+   * @param {EnableOptions} [options]
    */
   enable(options = { __proto__: null, apis: SUPPORTED_APIS, now: 0 }) {
     const internalOptions = { __proto__: null, ...options };
@@ -661,7 +661,7 @@ class MockTimers {
       internalOptions.apis = SUPPORTED_APIS;
     }
 
-    validateArray(internalOptions.apis, 'options.apis');
+    validateStringArray(internalOptions.apis, 'options.apis');
     // Check that the timers passed are supported
     ArrayPrototypeForEach(internalOptions.apis, (timer) => {
       if (!ArrayPrototypeIncludes(SUPPORTED_APIS, timer)) {