Following #9483 the daily CI exposed a few problems.
* The cluster creation code (uses redis-cli) is complicated to test with TLS enabled.
for now i'm just skipping them since the tests we run there don't really need that kind of coverage
* cluster port binding failures
note that `find_available_port` already looks for a free cluster port
but the code in `wait_server_started` couldn't detect the failure of binding
(the text it greps for wasn't found in the log)
(cherry picked from commit 7d6744c739)
Oran Agra
3ba7c6acbe