Remove expectations which were failing due to eager compilation now that we compile lazily in Ignition, and add intersection-observer/observer-exceptions.html which has recently started failing.

BUG=v8:5096
TBR=machenbach@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2053323002
Cr-Commit-Position: refs/heads/master@{#36884}