Use IsErrorDocument() to prevent BFCacheing of interstitials and errors.

In the bug, a crash occurs because we try to cache an interstitial. We
catch some error documents via status codes etc but interstitials do
not consistently set those. Checking IsErrorDocument() is more reliable.

Bug: 1274308,1287996
Change-Id: Ifec662c169c77e33ca5dc4d56b0e42c8d71f1d97
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3319862
Commit-Queue: Fergal Daly <fergal@chromium.org>
Reviewed-by: Rakina Zata Amni <rakina@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#981026}
NOKEYCHECK=True
GitOrigin-RevId: 7a05b426c6c51254a08de9a8dee8db9c1911b9c9

blink/public/devtools_protocol/browser_protocol.pdl

@@ -8131,6 +8131,7 @@ domain Page
       NoResponseHead
       Unknown
       ActivationNavigationsDisallowedForBug1234857
+      ErrorDocument
       #Blocklisted features
       WebSocket
       WebTransport