BuildRun reconciliation sets status on parent Build object

[adambkaplan]

If a BuildRun's parent Build object has the BuildRun deletion annotation, the reconciliation of a BuildRun can cause the parent Build object to have the status SetOwnerReferenceFailed. This pollutes the status of the Build object, since its top-level status includes information set by individual child objects.

If the BuildRun reconciler can't set the owner reference on a BuildRun object, this error should be reported in the status of the BuildRun object.

See https://github.com/shipwright-io/build/pull/824/files#r659178157

/kind bug

[sbose78]

Discussion in the grooming:

• Eventually, build's .status will probably go away since we'll be moving the validation to a webhook.
• Therefore, it makes more sense to move the SetOwnerReferenceFailed to BuildRun's status.