Add delay before start the load generator

This MR introduces a new delay field within the execution file in the execution section (e.g. BenchmarkExecution.execution.delay), which allows to specify a time (in seconds) between the creation of the app-k8s resources and the load-gen-k8s resources.

Closes #221 (closed)

Please Note: With this merge request we first distinguish between app-resources and load-gen-resources. Therefore, special attention must be paid to this when creating a benchmark.

theodolite-quarkus/src/main/kotlin/theodolite/benchmark/KubernetesBenchmarkDeployment.kt

@@ -45,7 +45,7 @@ class KubernetesBenchmarkDeployment(
             .map{ NewTopic(it.name, it.numPartitions, it.replicationFactor) }
         kafkaController.createTopics(kafkaTopics)
         appResources.forEach { kubernetesManager.deploy(it) }
-        logger.info { "Wait ${this.loadGenerationDelay} seconds before starting the workload generator." }
+        logger.info { "Wait ${this.loadGenerationDelay} seconds before starting the load generator." }
         Thread.sleep(Duration.ofSeconds(this.loadGenerationDelay).toMillis())
         loadGenResources.forEach { kubernetesManager.deploy(it) }
     }