rabbit_prometheus_http_SUITE: Start broker once in `special_chars` group (backport #12613)#12614

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

mergify/bp/v4.0.x/pr-12613rabbitmq/rabbitmq-server:mergify/bp/v4.0.x/pr-12613Copy head branch name to clipboard