Fix MQTT test flake in Khepri mixed version mode (backport #13235) (backport #13238)#13240

michaelklishin merged 1 commit intov4.0.xrabbitmq/rabbitmq-server:v4.0.xfrom

mergify/bp/v4.0.x/pr-13238rabbitmq/rabbitmq-server:mergify/bp/v4.0.x/pr-13238Copy head branch name to clipboard