Add resource type for threads (vertical scaling)

Will fix #269 (closed).

• Kafka Streams
• Flink
• Hazelcast Jet
• Beam/Flink
• Beam/Samza

Might be backported as feature previews to 0.8.x (see #403 (closed)).

theodolite-benchmarks/definitions/uc1-beam-samza/resources/beam-samza-service.yaml

@@ -5,13 +5,8 @@ metadata:
   labels:
     app: titan-ccp-aggregation
 spec:
-  #type: NodePort
   selector:
     app: titan-ccp-aggregation
   ports:
-  - name: http
-    port: 80
-    targetPort: 80
-    protocol: TCP
   - name: metrics
     port: 5556