Update RedpandaContainer (#6939)

Add `--overprovisioned` and `--smp` flags to the default RedpandaContainer configuration to make it more resilient on systems with Docker having access to lots of resources.

Author: shelajev

modules/redpanda/src/main/java/org/testcontainers/redpanda/RedpandaContainer.java

@@ -55,7 +55,7 @@ protected void containerIsStarting(InspectContainerResponse containerInfo) {
 
         String command = "#!/bin/bash\n";
 
-        command += "/usr/bin/rpk redpanda start --mode dev-container ";
+        command += "/usr/bin/rpk redpanda start --mode dev-container --overprovisioned --smp 1 ";
         command += "--kafka-addr PLAINTEXT://0.0.0.0:29092,OUTSIDE://0.0.0.0:9092 ";
         command +=
             "--advertise-kafka-addr PLAINTEXT://127.0.0.1:29092,OUTSIDE://" + getHost() + ":" + getMappedPort(9092);