add: Scaleway Cloud Provider for k8s CA

[louisportay]

Which component this PR applies to?

cluster-autoscaler

What type of PR is this?

/kind feature

What this PR does / why we need it:

this PR upstreams the implementation of the cluster-autoscaler used by the cloud provider Scaleway.

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

Do not hesitate to ping me on k8s slack channel #sig-autoscaling if anything =)

Does this PR introduce a user-facing change?

k8s users:
NONE

Kapsule users:
Scaleway users will have the choice of managing themselves the cluster-autoscaler pod therefore metrics will be scraped more easily.

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

I am happy to answer questions, let me know if you have any suggetions regarding the code.
The implementation has been tested in scaleway environment and is working as expected.

Louis

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: louisportay / name: Louis Portay (5323047)

[k8s-ci-robot]

Welcome @louisportay!

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[louisportay]

/easycla

[louisportay]

Is it mandatory for me to be part of kubernetes org to submit this pull request ? I thought I heard no during the sig meeting

[gjtempleton]

@louisportay Sorry, that's my bad, I should have been clearer. If you comment out the users who aren't members of the k8s org currently, as we do with e.g. Civo: https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/cloudprovider/civo/OWNERS it means we still know who to contact for reviews of the cloudprovider code changes.

[mwielgus]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: louisportay, mwielgus

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Needs approval from an approver in each of these files:

• cluster-autoscaler/OWNERS [mwielgus]

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[louisportay]

thanks !