[SURE-9111] OverrideTargets and clustersDesiredReady Count mismatch

[manno]

Could be related to rancher/dashboard#12232, rancher/rancher#46916, rancher/dashboard#11643

The calculation of gitrepo status fields has several problems:

It seems the clustersDesiredReady count does not work with the overrideTargets option. The result is set in the gitrepo.Status.DesiredReadyClusters.

Furthermore, the gitops controller, does not trigger for bundledeployment changes, but the resourceKey and "Bundle" condition are computed from bundledeployments. The "Bundle" condition contains gitrepo.Status.Summary, which consists of the ready and desiredReady for bundledeployments. The code assumes a bundle always changes after a bundledeployment changes and triggers the status update code that way.