Fix help text in kubectl top -h

[dfang]

close #82843

heapster deprecation timeline

What type of PR is this?

/kind documentation

/kind cleanup

What this PR does / why we need it:
Since heapster is deprecated and removed as doc stated, heapster in the help text should be replaced.

moreover, the heapster text in k8s.po should be replaced as well.

all code related to heapster should be removed. removal would be better in another pr

Which issue(s) this PR fixes:

Fixes #82843

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.:

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[dfang]

/assign @liggitt

[dfang]

can i just simply replace heapster text in k8s.po files in kubernetes/translations/kubectl folders ?

[hpandeycodeit]

/lgtm
/ok-to-test

[liggitt]

/lgtm
/approve
/priority backlog
/kind documentation

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[APPROVALNOTIFIER] This PR is APPROVED

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

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