chore(kind): enable nftables for kind suite

[abramche]

Description of your changes:
Switch kind setup to use nftables instead of iptables

Which issue is resolved by this Pull Request:
Resolves https://scylladb.atlassian.net/browse/OPERATOR-137

/kind machinery
/priority important-soon

[abramche]

/test images
/retest

[scylla-operator-bot]

@abramche: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-gke-parallel	4311612	link	true	/test e2e-gke-parallel

Full PR test history. Your PR dashboard.

Details

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-sigs/prow repository. I understand the commands that are listed here.

[abramche]

the only parallel failure is fixed in #3470

[czeslavo]

/lgtm

[scylla-operator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abramche, czeslavo

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [czeslavo]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment