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/update-index.sh

@@ -3,7 +3,7 @@
 RELEASE_NAME=$1 # Supposed to be equal to tag, e.g., v0.3.0
 
 RELEASE_PATH="https://github.com/cau-se/theodolite/releases/download"
-REPO_INDEX="../../docs/index.yaml"
+REPO_INDEX="../docs/index.yaml"
 
 helm repo index . --url $RELEASE_PATH/$RELEASE_NAME --merge $REPO_INDEX && \
   mv index.yaml $REPO_INDEX
\ No newline at end of file