update swagger gen from 1.28.0

[tg123]

No description provided.

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[tg123]

include fix to #1340 with kubernetes-client/gen#248

[brendandburns]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, tg123

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