Fix static failures for vendor/k8s.io/apiserver/pkg/endpoints/handlers

[chymy]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Part of #92402

vendor/k8s.io/apiserver/pkg/endpoints/handlers/delete.go:145:21: options.OrphanDependents is deprecated: please use the PropagationPolicy, this field will be deprecated in 1.7. Should the dependent objects be orphaned. If true/false, the "orphan" finalizer will be added to/removed from the object's finalizers list. Either this field or PropagationPolicy may be set, but not both. +optional  (SA1019)
vendor/k8s.io/apiserver/pkg/endpoints/handlers/delete.go:145:58: options.OrphanDependents is deprecated: please use the PropagationPolicy, this field will be deprecated in 1.7. Should the dependent objects be orphaned. If true/false, the "orphan" finalizer will be added to/removed from the object's finalizers list. Either this field or PropagationPolicy may be set, but not both. +optional  (SA1019)
vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager_test.go:58:43: argument out is overwritten before first use (SA4009)
vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager_test.go:61:3: assignment to out
vendor/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/errors_test.go:86:17: observer.HeaderMap is deprecated: HeaderMap exists for historical compatibility and should not be used. To access the headers returned by a handler, use the Response.Header map as returned by the Result method.  (SA1019)
vendor/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go:247:5: var nopCloser is unused (U1000)
vendor/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers_test.go:67:3: field wantBody is unused (U1000)

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[liggitt]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chymy, liggitt

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[chymy]

/test pull-kubernetes-e2e-kind

[fedebongio]

/triage accepted