Configure App-Bound encryption to return new temporary key error

App-Bound will now return a temporary key error if a non-standard user
data dir is used.

This means decryption will not be available.

This should have minimal impact since App-Bound encryption was already
not available - but this now expands this to decryption as well.

A cookie encryption test that previously verified the old behavior is
moved to the app-bound specific tests, which also verify that the
decrypt is only failing temporarily.

A default-enabled feature is emplaced to allow this functionality to be
disabled if any problems occur in prod.

BUG=394919677

Change-Id: I7c7f27dc0144af19c4bf122dac6b483d6067d359
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6237065
Reviewed-by: Matt Mueller <mattm@chromium.org>
Commit-Queue: Will Harris <wfh@chromium.org>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1417501}