Issue #3372972 by Wim Leers, phenaproxima, NickDickinsonWilde, smustgrave: Fix all type: machine_name constraint violations in tests

Issue #3112452 by lalitware, guilhermevp, narendra.rajwar27, WagnerMelo, ravi.shankar, mradcliffe, adalbertov, himanshu_sindhwani, quondam, Vidushi Mehta, alexpott, longwave, anmolgoyal74: Fix indentation consistency in core's yaml files

Issue #3014629 by quietone, Wim Leers, xurizaemon: Document that Configuration migrations can depend on Content migrations

Issue #3165944 by Wim Leers, anmolgoyal74, quietone: d7_shortcut migration should not have a dependency on d7_menu_links

Issue #2936365 by quietone, mikelutz, heddn, larowlan, masipila, effulgentsia, maxocub, Gábor Hojtsy, webchick, phenaproxima, jhodgdon, catch: Migrate UI - allow modules to declare the state of their migrations

Issue #2711099 by heddn, Jo Fitzgerald, edysmp, edgewl2, alexpott, Charlotte17, mikeryan, masipila, quietone, maxocub, phenaproxima: Categorize migrations according to their type

Issue #2917883 by quietone, TR, Jo Fitzgerald, masipila, phenaproxima: Rename 'migration_templates' directories in core modules to 'migrations'