feat: Support SINGLE_NODE_MULTI_WRITER capability

[apricote]

CSI Spec v1.5.0 introduced a new Capability SINGLE_NODE_MULTI_WRITER, which specializes the SINGLE_NODE_WRITER volume access mode into the "sub"-access modes SINGLE_NODE_SINGLE_WRITER and SINGLE_NODE_MULTI_WRITER.

This was added because the existing spec was conflicting. We currently behave like SINGLE_NODE_MULTI_WRITER, so we should just use that in the code.

This requires upgrading all our sidecar containers.

We can also enable the Kubernetes E2E tests flag Feature:SELinuxMountReadWriteOncePod once we have implemented this.

[github-actions]

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[github-actions]

This issue has been marked as stale because it has not had recent activity. The bot will close the issue if no further action occurs.