[bfcache] Rename reasons to match the spec

This CL renames the reporting strings of NotRestoredReasons API so that
they match the spec draft[1].

[1]: whatwg/html#10154

Bug: 331754704
Change-Id: If805ad7e30c14ff64b440c8d9515eaee38370fd8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5392283
Commit-Queue: Yuzu Saijo <yuzus@chromium.org>
Reviewed-by: Rakina Zata Amni <rakina@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1280059}

performance-timeline/not-restored-reasons/performance-navigation-timing-navigation-failure.tentative.window.js

@@ -22,5 +22,5 @@ promise_test(async t => {
 
   // Check the BFCache result and the reported reasons.
   await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ false);
-  await assertNotRestoredFromBFCache(rc1, ['navigation-failure']);
+  await assertNotRestoredFromBFCache(rc1, ['response-status-not-ok']);
 });

webrtc/back-forward-cache-with-open-webrtc-connection.https.window.js

@@ -16,5 +16,5 @@ promise_test(async t => {
   await openWebRTC(rc1);
   // The page should not be eligible for BFCache because of open WebRTC connection and live MediaStreamTrack.
   await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ false);
-  await assertNotRestoredFromBFCache(rc1, ['webrtc', 'media-stream']);
+  await assertNotRestoredFromBFCache(rc1, ['rtc', 'mediastream']);
 });