Issue #2976889 by phenaproxima, xjm, samuel.mortenson, chr.fritsch: Add a trait to create media types in tests and replace MediaFunctionalTestCreateMediaTypeTrait

Issue #2877383 by chr.fritsch, starshaped, seanB, phenaproxima, xjm, Wim Leers, Gábor Hojtsy, marcoscano, alexpott, Berdir: Add action support to Media module