Infer MR Type from Changelog Trailers

Objective

Increase type::* label coverage and accuracy by applying ~type::* labels based on https://gitlab.com/gitlab-org/ruby/gems/gitlab-dangerfiles/-/blob/master/.gitlab/changelog_config.yml

• "fixed" typebug
• "security" bugvulnerability
• "added" featureaddition
• "deprecated" ~"feature::removal"
• "removed" ~"feature::removal"