rabbit_semver: handle [more complex] prefixes (backport #15232)#15249

dcorbacho merged 2 commits intov4.2.xrabbitmq/rabbitmq-server:v4.2.xfrom

mergify/bp/v4.2.x/pr-15232rabbitmq/rabbitmq-server:mergify/bp/v4.2.x/pr-15232Copy head branch name to clipboard