kubeadm: improve ux on infoMsg kubeconfig

[MalloZup]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:
improve partially kubernetes/kubeadm#1361
Which issue(s) this PR fixes:
Fixes partially kubernetes/kubeadm#1361 ( it is a sub-pr).

Does this PR introduce a user-facing change?:

None

[k8s-ci-robot]

Hi @MalloZup. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[yagonobre]

Thanks @MalloZup, can you remove the release note?
/ok-to-test
/kind cleanup
/important backlog

[yagonobre]

/lgtm
/priority backlog

[MalloZup]

@yagonobre thx. removed 🚀

[MalloZup]

/retest

[rosti]

/assign @neolit123
For approval.

[neolit123]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: MalloZup, neolit123

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