Remove rebalance in Flink benchmarks

Requires load testing

execution/helm/templates/theodolite/crd-benchmark.yaml

@@ -55,12 +55,11 @@ spec:
                           resource:
                             type: string
                             default: ""
-                          config:
+                          properties:
                             type: object
                             additionalProperties: true
                             x-kubernetes-map-type: "granular"
-                            default: 
-                              "": ""
+                            default: {}
               loadTypes:
                 type: array
                 minItems: 1
@@ -81,12 +80,11 @@ spec:
                           resource:
                             type: string
                             default: ""
-                          config:
+                          properties:
                             type: object
                             additionalProperties: true
                             x-kubernetes-map-type: "granular"
-                            default: 
-                              "": ""
+                            default: {}
               kafkaConfig:
                 type: object
                 properties: