fix(Redpanda): Add missing command-line arguments to the startup script (smp, memory) (#1364)

Author: RobotechUSA

src/Testcontainers.Redpanda/RedpandaBuilder.cs

@@ -59,6 +59,8 @@ protected override RedpandaBuilder Init()
                 startupScript.Append(lf);
                 startupScript.Append("/usr/bin/rpk redpanda start ");
                 startupScript.Append("--mode dev-container ");
+                startupScript.Append("--smp 1 ");
+                startupScript.Append("--memory 1G ");
                 startupScript.Append("--kafka-addr PLAINTEXT://0.0.0.0:29092,OUTSIDE://0.0.0.0:9092 ");
                 startupScript.Append("--advertise-kafka-addr PLAINTEXT://127.0.0.1:29092,OUTSIDE://" + container.Hostname + ":" + container.GetMappedPublicPort(RedpandaPort));
                 return container.CopyAsync(Encoding.Default.GetBytes(startupScript.ToString()), StartupScriptFilePath, Unix.FileMode755, ct);