Transfer mise trust to review worktree - #115

Mise wraps Git so it refuses to read an untrusted mise.toml. The review
checkout lives under the repository's Git directory, so mise does not
inherit the source worktree's trust. Review checkout validation then
fails at the first Git command, before Timber can reset the checkout.

Copy the source worktree's trust state to the review checkout when the
checkout has a mise config. Copy trust in both directions: trust the
review checkout when the source is trusted, and untrust it when the
source is untrusted, so a review of an untrusted worktree cannot reuse
trust that an earlier review left behind.

Mirror the trust again after the reset because paranoid mise ties trust
to file contents, and a reset can change them.

Change-Id: I6f7397be4b751a066ede302c2ace1415ac5edd28

The fake mise records the working directory that the shell reports, which
is the physical path. macOS gives the temporary directory a symlinked
path, so the recorded directories never matched the ones the test built:
the trust state looked untrusted and the failure cases reported no error.

Resolve the temporary directories in the test, as other review tests do.

Change-Id: I0724689f4e2e77b7ee29eeb549518b4243527ca6