Make patcher parameters flexible

This MR changes the way patchers are configured:

Now a patcher definition takes 3 arguments:

1. type: patcher type, e.g. ReplicaPatcher.
2. resource: Kuberntes resources to be patched
3. config: a map containing all configuration parameters for the specific patcher

This makes it possible to improve the configurability of the NumNestedGroupsLoadGeneratorReplicaPatcher and the NumSensorsLoadGeneratorReplicaPatcher.

For example:

- type: "NumSensorsLoadGeneratorReplicaPatcher"
  resource: "uc1-load-generator-deploym ent.yaml"
  config:
    loadGenMaxRecords: "15000"

Closes #233 (closed)

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

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