modules: tf-m: disable tf-m-tests revision checks

Permanently disable the revision checks made in the tf-m-tests
repository that were introduced with TF-M 2.1.0.

They fail because the expected upstream tags are not found in Zephyr's
tf-m-tests.

Signed-off-by: Tomi Fontanilles <tomi.fontanilles@nordicsemi.no>