Revert "Update focus-navigation WPT forward to use test_driver.Actions"

This reverts commit 5ca29ac8df39fb902b44a9f4e1d3118feea544cf.

Reason for revert: Suspicious about causing WPTs failing or flakily failing.
https://ci.chromium.org/ui/p/chromium/builders/ci/Mac11%20Tests/27459/overview
https://ci.chromium.org/ui/p/chromium/builders/ci/Mac12%20Tests/19475/overview

Original change's description:
> Update focus-navigation WPT forward to use test_driver.Actions
>
> Previous patch changed navigateFocusForward() in focus-utils.js
> to send keyboard event on the document.documentElement.
> This change was not interoperable [1]. We update to send the keyboard
> event using test_driver.Actions() and without specifying an element
> to send keys to.
>
> [1] https://github.com/web-platform-tests/wpt/pull/45772#discussion_r1591235292
>
> Change-Id: I3b2a4a38ea4edb4d05d8c4a34505f0f8083f6460
> Bug: 40542192
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5519292
> Reviewed-by: Joey Arhar <jarhar@chromium.org>
> Commit-Queue: Di Zhang <dizhangg@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1297032}

Bug: 40542192
Change-Id: I147968c0f75c59f92a5b5406ab20ba1f23f01455
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5513895
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Yuki Shiino <yukishiino@chromium.org>
Auto-Submit: Yuki Shiino <yukishiino@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1297215}
diff --git a/shadow-dom/focus-navigation/resources/focus-utils.js b/shadow-dom/focus-navigation/resources/focus-utils.js
index ef517c5..f4056dc 100644
--- a/shadow-dom/focus-navigation/resources/focus-utils.js
+++ b/shadow-dom/focus-navigation/resources/focus-utils.js
@@ -7,10 +7,7 @@
 async function navigateFocusForward() {
   await waitForRender();
   const kTab = '\uE004';
-  await new test_driver.Actions()
-    .keyDown(kTab)
-    .keyUp(kTab)
-    .send();
+  await new test_driver.send_keys(document.documentElement,kTab);
   await waitForRender();
 }