fix: fix stagedUpdateRun PolicyObservedClusterCount

[jwtty]

Description of your changes

1. When scheduling policy is PickAll, we update PolicyObservedClusterCount to the number of scheduled/bound clusterResourceBindings, instead of -1. For PickFix and PickN, we validate if the number of bindings match the expected count.
2. Add more output in one of the integration test to help debugging UT flakes.

Fixes #

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Special notes for your reviewer

[ryanzhang-oss]

as we discussed off line, we just need to add something like this to the updateRun object

// +kubebuilder:validation:XValidation:rule="size(self.metadata.name) < 128",message="metadata.name max length is 127"

[jwtty]

as we discussed off line, we just need to add something like this to the updateRun object

// +kubebuilder:validation:XValidation:rule="size(self.metadata.name) < 128",message="metadata.name max length is 127"

Since we only need to add more API validations, I'll make the change in the API change PR: #1008