stackit csi use new stackit client

[aniruddha2000]

How to categorize this PR?

/kind enhancement

What this PR does / why we need it:

This PR is a part of breaking down #1060 PR into smaller pieces, where we are having csi using new stackit client.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

IaaS functions being added

CreateSnapshot
ListSnapshots
DeleteSnapshot
GetSnapshot
WaitSnapshotReady

CreateBackup
ListBackups
DeleteBackup
GetBackup
WaitBackupReady

CreateVolume
DeleteVolume
AttachVolume
DetachVolume
GetVolume
GetVolumesByName
ListVolumes
ExpandVolume
WaitVolumeTargetStatus
WaitDiskAttached
WaitDiskDetached
WaitVolumeTargetStatusWithCustomBackoff

Breaking changes:

[ske-prow]

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[ske-prow]

@aniruddha2000: 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
pull-cloud-provider-stackit-verify	4786756	link	true	/test pull-cloud-provider-stackit-verify

Full PR test history. Your PR dashboard. Command help for this repository.
Please help us cut down on flakes by linking this test failure to an open flake report or filing a new flake report if you can't find an existing one. Also see the gardener testing guideline for how to avoid and hunt flakes.

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.

[aniruddha2000]

/ondemand create --ske-base-branch=cleanup-stackit-client-2

[ske-prow]

Hey @aniruddha2000, I'm managing your ondemand environment ond-airedale. I've successfully transitioned from phase "preheated" to "provisioned".

👩‍🌾 Gardener Dashboard
🚀 STACKIT Portal

How to Connect

Retrieve kubeconfig to interact with the environment with kubectl ske (assuming you're connected to the prow-trusted cluster):

gardenctl target --garden prd --project 74140853d0 --shoot prow-trust
kubectl ske connect ondemand ond-airedale

To connect to the API, you can retrieve the Password from the prow-trusted cluster:

export BASIC_AUTH_USERNAME=$(kubectl get -n ondemand secret ond-airedale-credentials -ojsonpath='{.data.username}' | base64 -d)
export BASIC_AUTH_PASSWORD=$(kubectl get -n ondemand secret ond-airedale-credentials -ojsonpath='{.data.password}' | base64 -d)
export PROJECT_ID=$(kubectl get -n ondemand secret ond-airedale-credentials -ojsonpath='{.data.projectID}' | base64 -d)
export SNA_PROJECT_ID=$(kubectl get -n ondemand secret ond-airedale-credentials -ojsonpath='{.data.snaProjectID}' | base64 -d)
export SKE_API=https://ske-api.ing.ond-airedale.ci.ske.eu01.stackit.cloud
curl -u "$BASIC_AUTH_USERNAME:$BASIC_AUTH_PASSWORD" "$SKE_API/v2/projects/$PROJECT_ID/regions/eu01/clusters"