After upgrade, allow cilium to be back before uncordoning

[reneluria]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

During upgrades, when using cilium as the network plugin, wait for cilium pod to be ready before uncordoning node

Does this PR introduce a user-facing change?:

[Cilium] During upgrades, wait for cilium pod to be ready before uncordoning node, add new option `upgrade_post_cilium_wait_timeout` to control that (By default 120 seconds)

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[k8s-ci-robot]

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[floryut]

/cc @champtar @oomichi

[oomichi]

Thanks for doing this.
just one comment.

[oomichi]

Thanks for updating.

/ok-to-test
/lgtm

[floryut]

@reneluria Thanks for that 🙇

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floryut, reneluria

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