rabbitmq_ct_helpers: Fix how we set `$RABBITMQ_FEATURE_FLAGS` in tests#13077

dumbbell merged 1 commit intomainrabbitmq/rabbitmq-server:mainfrom

fix-how-RABBITMQ_FEATURE_FLAGS-is-set-in-testsrabbitmq/rabbitmq-server:fix-how-RABBITMQ_FEATURE_FLAGS-is-set-in-testsCopy head branch name to clipboard