Fix redpanda tests

It seems[^1] that `redpanda` will now throw errors if the advertised
address is set to `0.0.0.0`.

[^1]: (redpanda-data/redpanda#12395)

redpanda/lib/testcontainers/redpanda.rb

@@ -75,8 +75,8 @@ def _startup_script
       startup_script = StringIO.new
       startup_script.print("#!/bin/sh\n")
       startup_script.print("/usr/bin/rpk redpanda start --mode dev-container")
-      startup_script.print(" --kafka-addr PLAINTEXT://0.0.0.0:29092,OUTSIDE://0.0.0.0:9092")
-      startup_script.print(" --advertise-kafka-addr PLAINTEXT://0.0.0.0:29092,OUTSIDE://#{host}:#{mapped_port(port)}")
+      startup_script.print(" --kafka-addr PLAINTEXT://127.0.0.1:29092,OUTSIDE://127.0.0.1:9092")
+      startup_script.print(" --advertise-kafka-addr PLAINTEXT://127.0.0.1:29092,OUTSIDE://#{host}:#{mapped_port(port)}")
       startup_script
     end