Update preparefork to accept ssh/http option and add new function to push with options

[cpanato]

What type of PR is this?

/kind feature

What this PR does / why we need it:

• add option to set ssh or http for preparefork
• add push with options for special cases you need to define better the push

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

Does this PR introduce a user-facing change?

- add option to set ssh or http for preparefork
- add push with options for special cases you need to define better the push

[cpanato]

/assign @saschagrunert @xmudrii @puerco
cc @kubernetes-sigs/release-engineering

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, saschagrunert

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