tests/functional: Increase the timeout of the mips64el_replay test

tests/functional: Increase the timeout of the mips64el_replay test

We run the gitlab-CI with the untrusted tests enabled, and
the test_replay_mips64el_malta_5KEc_cpio subtest is rather slow,
so this already hit the standard 90 seconds timeout in the CI.
Increase the timeout for more headroom.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20250305074353.52552-1-thuth@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>