Issue #3325557 by longwave, mondrake, kim.pepper: Enable more service autowiring by adding interface aliases to core modules

Issue #3114785 by slootjes, longwave: [Symfony 5] Update deprecated short factory configurators in Yaml

Issue #2977107 by Berdir, alexpott, jibran, larowlan: Use more specific entity.manager services in module .services.yml files

Issue #2325801 by jibran, larowlan: Abstract contact module mail delivery out of form into a service.

Issue #2109035 by tim.plunkett, damiankloip, dawehner, chx: Make access checkers (much) easier to find.

Issue #2089635 by tim.plunkett, disasm, larowlan: Convert non-test non-form page callbacks to routes and controllers.