🐛 api/additionalPorts: don't create UDP rules

[EmilienM]

What this PR does / why we need it:

When providing additional ports to open on the control plane security group, we'll only open TCP from now as it was initially documented.

Opening UDP by default might not be desired for security reasons.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #1704

/hold

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[EmilienM]

/retest

[dulek]

/lgtm

[mdbooth]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: EmilienM, mdbooth

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[EmilienM]

/hold cancel

[jichenjc]

maybe we should consider add a release notes about this as we changed previous behavior