Get rid of base/containers/contains.h use in net/cert/pki

Bug: 1322914
Change-Id: I0b9a82103e04751d7d5642a3e0f3fdfd27bd2c1c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4056001


Commit-Queue: Bob Beck <bbe@google.com>
Reviewed-by: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1076503}