ConnectorCatalog CRD should have separate ConfigFieldDefinitions for source and sink

[alpreu]

Currently the ConnectorCatalog CRD has a single property configFieldDefinitions to retrieve the config properties from a connector. However this means, the properties for connectors that have both a source and sink get mixed together. We need to separate this property into two: sourceConfigFieldDefinitions and sinkConfigFieldDefinitions, so they can be retrieved independently