fix: invalid ParentObj in output

[panpan0000]

The GetParent() always return false and the invoker never respect its return value.

So add the boolean return value (I believe it means "found" )

Closes #1067

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[arbreezy]

Nice catch @panpan0000

[arbreezy]

@panpan0000 we need to fix this test as well , https://github.com/k8sgpt-ai/k8sgpt/blob/main/pkg/util/util_test.go#L85

[panpan0000]

@panpan0000 we need to fix this test as well , https://github.com/k8sgpt-ai/k8sgpt/blob/main/pkg/util/util_test.go#L85

Thank you for reminder. @arbreezy , fixed as well.