Migrate existing workload generators to refactored Kafka sender

benchmarks/uc1-workload-generator/src/main/java/theodolite/uc1/workloadgenerator/LoadGenerator.java

@@ -65,7 +65,7 @@ public final class LoadGenerator {
     kafkaProperties.compute(ProducerConfig.BUFFER_MEMORY_CONFIG, (k, v) -> kafkaBufferMemory);
 
     final KafkaRecordSender<ActivePowerRecord> kafkaRecordSender =
-        new KafkaRecordSender.Builder<ActivePowerRecord>(
+        KafkaRecordSender.<ActivePowerRecord>builder(
             kafkaBootstrapServers,
             kafkaInputTopic,
             schemaRegistryUrl)

benchmarks/uc2-workload-generator/src/main/java/theodolite/uc2/workloadgenerator/LoadGenerator.java

@@ -91,7 +91,7 @@ public final class LoadGenerator {
     kafkaProperties.compute(ProducerConfig.BUFFER_MEMORY_CONFIG, (k, v) -> kafkaBufferMemory);
 
     final KafkaRecordSender<ActivePowerRecord> kafkaRecordSender =
-        new KafkaRecordSender.Builder<ActivePowerRecord>(
+        KafkaRecordSender.<ActivePowerRecord>builder(
             kafkaBootstrapServers,
             kafkaInputTopic,
             schemaRegistryUrl)

benchmarks/uc4-workload-generator/src/main/java/theodolite/uc4/workloadgenerator/LoadGenerator.java

@@ -73,7 +73,7 @@ public final class LoadGenerator {
     kafkaProperties.compute(ProducerConfig.BUFFER_MEMORY_CONFIG, (k, v) -> kafkaBufferMemory);
 
     final KafkaRecordSender<ActivePowerRecord> kafkaRecordSender =
-        new KafkaRecordSender.Builder<ActivePowerRecord>(
+        KafkaRecordSender.<ActivePowerRecord>builder(
             kafkaBootstrapServers,
             kafkaInputTopic,
             schemaRegistryUrl)