Validations for KubefedConfig API

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Field Validations for KubefedConfig:

• scope must be a valid enum value. It should be immutable.
• ControllerDuration
  • availableDelay is a valid int64 > 0
  • unavailableDelay is a valid int64 > 0
• LeaderElectConfig
  • leaseDuration is a valid int64 > 0 and must be > renewDeadline
  • renewDeadline is a valid int64 > 0 and must be > retryPeriod * JitterFactor
  • retryPeriod is a valid int64 > 0
  • resourceLock should be a valid enum value
• FeatureGatesConfig
  • name should be a valid feature name
  • configuration should be a valid enum value
• ClusterHealthCheckConfig
  • All fields should be a valid int64 > 0
• SyncControllerConfig
  • AdoptResources should be a valid enum value.

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• LeaderElectConfig
  • leaseDuration must be greater than renewDeadline
  • renewDeadline must be greater than retryPeriod*JitterFactor