hook: split config reading further We want an easy way to fetch the hook config with and without honoring "trusted" so that we can compare the values. So we extract the part retrieving raw hook data from the config to be able to call it twice in the next patch.

hook: small refactor to store hooks as dict instead of list We are about to take untrusted hooks into account (to report them as failures) so we need to rearrange the code a bit to allow config overwriting each other in a later patch.