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/src/main/kotlin/theodolite/evaluation/AnalysisExecutor.kt

@@ -51,7 +51,7 @@ class AnalysisExecutor(
                     fetcher.fetchMetric(
                         start = interval.first,
                         end = interval.second,
-                        query = slo.query
+                        query = SloConfigHandler.getQueryString(sloType = slo.sloType)
                     )
                 }