Add ClusterNamespace Annotations to Worker Nodes

[moadqassem]

What this PR does / why we need it:
The new KubeVirt CSI driver expects the tenant cluster nodes should have an annotation that determines the tenant cluster namespace in the infra cluster. This PR reads the namespace value from the machine deployment spec and adds it to the node annotations.

Which issue(s) this PR fixes:

Fixes #

What type of PR is this?
/kind chore

Special notes for your reviewer:

Does this PR introduce a user-facing change? Then add your Release Note here:

Support KubeVirt cluster namespace annotations for KubeVirt worker nodes

Documentation:

None

[kron4eg]

/approve

[kubermatic-bot]

LGTM label has been added.

Git tree hash: 7e853868d6451ccf5e74eab41a370889de1c07bb

[kron4eg]

/retest

[moadqassem]

/hold

[moadqassem]

/unhold

[kron4eg]

/approve

[kubermatic-bot]

LGTM label has been added.

Git tree hash: 935aac9c1ff02e482f9c7f5374d09fe531cbc4a1

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kron4eg

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• OWNERS [kron4eg]

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[moadqassem]

/cherrypick release/v1.61

[kubermatic-bot]

@moadqassem: #1924 failed to apply on top of branch "release/v1.61":

Applying: add clusterNamespace annotations Signed-off-by: moadqassem <[email protected]>
Applying: initialize annotation
Using index info to reconstruct a base tree...
M	pkg/admission/machines.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/admission/machines.go
CONFLICT (content): Merge conflict in pkg/admission/machines.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"
Patch failed at 0002 initialize annotation

In response to this:

/cherrypick release/v1.61

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