feat(helm): add support for exoscale provider

[thomasstxyz]

What type of PR is this?

/kind feature

What this PR does / why we need it:

• adds support for exoscale cloudprovider in cluster-autoscaler helm chart

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?

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

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: thomasstxyz / name: Thomas Stadler (b7b45f7, 185cae3, c873215)

[k8s-ci-robot]

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[Shubham82]

Hi, @thomasstxyz
you have to sign the CLA before the PR can be reviewed.
See the following document to sign the CLA: Signing Contributor License Agreements(CLA)

[Shubham82]

To check EasyCLA

/easycla

[thomasstxyz]

Hi, @thomasstxyz you have to sign the CLA before the PR can be reviewed. See the following document to sign the CLA: Signing Contributor License Agreements(CLA)

Hi @Shubham82 I signed. Please review!

[mwielgus]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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