Make the analysis of experiments more flexible

• Allow arbitrary prometheus range queres (update prometheusResponse)
• Allow usage of more than one slo checker
• Update the json which send to the python slo checker
• refactoring
• Update CRDs in order to set the query string as an dedicated parameter for a slo checker
• Update exisiting python slo checker in order to use the new JSON format (handled in !185 (merged))

Closes #249 (closed)

theodolite/crd/crd-execution.yaml

@@ -51,7 +51,7 @@ spec:
                     description: The type of the resource. It must match one of the resource types specified in the referenced benchmark.
                     type: string
                   resourceValues:
-                    descriptoin:  List of resource values for the specified resource type.
+                    description:  List of resource values for the specified resource type.
                     type: array
                     items:
                       type: integer