Draft: Add Spark Structured Streaming based Benchmarks

This merge request includes Spark Structured Streaming benchmarks for use-cases 1 to 3. Furthermore, all necessary resources for execution with Theodolite on a Kubernetes cluster are included.

helm/values.yaml

@@ -327,11 +327,13 @@ operator:
       uc2LoadGenerator: true
       uc2Kstreams: true
       uc2Flink: true
+      uc2Spark: true
       uc2BeamFlink: true
       uc2BeamSamza: true
       uc3LoadGenerator: true
       uc3Kstreams: true
       uc3Flink: true
+      uc3Spark: true
       uc3BeamFlink: true
       uc3BeamSamza: true
       uc4LoadGenerator: true
@@ -346,10 +348,12 @@ operator:
       uc1BeamSamza: true
       uc2Kstreams: true
       uc2Flink: true
+      uc2Spark: true
       uc2BeamFlink: true
       uc2BeamSamza: true
       uc3Kstreams: true
       uc3Flink: true
+      uc3Spark: true
       uc3BeamFlink: true
       uc3BeamSamza: true
       uc4Kstreams: true