use stackit csi driver for etcd

[breuerfelix]

How to categorize this PR?

/kind bug

What this PR does / why we need it:
The etcd storageclass defaults to openstack instead of to stackit CSI

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Breaking changes:

/hold until tested

[breuerfelix]

/unhold can be merged since we set this value explicitly to cinder.csi.openstack.org.

[ske-prow]

LGTM label has been added.

Details

Git tree hash: e1c3d6ae623c234e604274e4b87aaaf7d7e9fbd2

[ske-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nschad

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• OWNERS [nschad]

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[nschad]

/override pull-gardener-extension-provider-stackit-infra-integration-tests

[ske-prow]

@nschad: Overrode contexts on behalf of nschad: pull-gardener-extension-provider-stackit-infra-integration-tests

Details

In response to this:

/override pull-gardener-extension-provider-stackit-infra-integration-tests

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