Null annotation value causes omission of all annotations without error

[Reasonably]

Description

• This is related to kubernetes/apimachinery@8d8a7ac.
• In the previous apimachinery pkg, the logic for retrieving unstructured meta annotations returned an error if a null was present.
• As seen at https://github.com/kubernetes/apimachinery/blame/v0.33.0-rc.1/pkg/apis/meta/v1/unstructured/unstructured.go#L412, the logic was changed in version v0.33 to perform null coercing, but it has not been officially released yet.
• When a null is encountered, GetAnnotations returns nil, causing all annotations to be omitted.
  • https://github.com/gavinbunney/terraform-provider-kubectl/blob/master/kubernetes/resource_kubectl_manifest.go#L203
• There is nothing we can fix in this project, but the issue exists and I'm leaving this here in the hope that it will be resolved once the pkg is released.