Include AlternativeFormatProvider in CIP.
Remove CIP special-casing in AttachmentVisibility.
Fix AttachmentVisibility tests.

Remove tests that check CIP functionality separately from Editions.

Use consultation_outcome instead of CIP in test for non-Edition visibility.
Ensure CIPs are published in search observer test.
Add published_CIP test factory.
Output html when assert_rewrites_link fails.
Rewrite CIP admin links in govspeak.

Already covered by the govspeak_helper_link_rewriting_test.
Fix code and test for listing unused CIP types.