debian-builder: use golang:1.16.7-buster as the base image

[palnabarun]

Signed-off-by: Nabarun Pal [email protected]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Ref: https://kubernetes.slack.com/archives/CJH2GBF7Y/p1629401120230000?thread_ts=1629353341.198900&cid=CJH2GBF7Y

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

[palnabarun]

/assign @kubernetes/release-managers

[puerco]

/lgtm
/approve

Thank you :)

[justaugustus]

Thanks @palnabarun!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: justaugustus, palnabarun, puerco

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[teonsean-dm]

/joke

[k8s-ci-robot]

@teonsean-dm: Why does it take longer to get from 1st to 2nd base, than it does to get from 2nd to 3rd base? Because there’s a Shortstop in between!

In response to this:

/joke

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[teonsean-dm]

/joke

[k8s-ci-robot]

@teonsean-dm: I wish I could clean mirrors for a living. It's just something I can see myself doing.

In response to this:

/joke

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.