Scaleway integration

[Mia-Cross]

This is the latest version of my work for the integration of Scaleway in kOps.
Commits are squashed in this version for better readability but the original history is still available in the branch scw_init that I left as it were before the big rebase I did after the merge of #14431 in upstream.

EDIT: I meant to open this PR on my own fork and not here as it's way too big, I'll keep making smaller PRs instead. Next up will be the nodeidentity part and the listing of resources for deletion, and then the DNS after that.

[k8s-ci-robot]

Hi @Mia-Cross. 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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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.

[hakman]

/ok-to-test

[k8s-ci-robot]

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

Test name	Commit	Details	Required	Rerun command
pull-kops-verify-boilerplate	769aa74	link	true	/test pull-kops-verify-boilerplate
pull-kops-verify-gofmt	769aa74	link	true	/test pull-kops-verify-gofmt
pull-kops-verify-gomod	769aa74	link	true	/test pull-kops-verify-gomod
pull-kops-build	769aa74	link	true	/test pull-kops-build
pull-kops-verify-govet	769aa74	link	true	/test pull-kops-verify-govet
pull-kops-verify-golangci-lint	769aa74	link	true	/test pull-kops-verify-golangci-lint
pull-kops-test	769aa74	link	true	/test pull-kops-test
pull-kops-e2e-k8s-gce-cilium	769aa74	link	true	/test pull-kops-e2e-k8s-gce-cilium
pull-kops-e2e-k8s-aws-calico	769aa74	link	true	/test pull-kops-e2e-k8s-aws-calico
pull-kops-e2e-cni-cilium-eni	8781e05	link	true	/test pull-kops-e2e-cni-cilium-eni
pull-kops-e2e-cni-cilium-etcd	8781e05	link	true	/test pull-kops-e2e-cni-cilium-etcd

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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. I understand the commands that are listed here.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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