Unborking the accept-ch-lifetime CH WPT
Due to some broswer-state related flakiness, the
"accept-ch-lifetime.tentative.https.html" test was split
into several different files. Also, all mentions of "lifetime"
in the tests was removed to keep up to date with the Client Hint
Reviewed-by: Yoav Weiss email@example.com
Commit-Queue: Aaron Tagliaboschi firstname.lastname@example.org