Kiali migrate from using Cytoscape to Patternfly

With the 2.x.x major update for Kiali or cypress test broke. This is because Kiali upstream changed the default graph implementation to use Patterfly in place of the deprecated Cytoscape.

The following config was added the the chart/values.yaml as a temporary bandaid fix for the failing cypress tests:

spec:
  kiali_feature_flags:
    ui_defaults:
      graph:
        impl: "cy"

https://kiali.io/news/release-notes/