Change data dir of teleport

[njuettner]

We currently store the sessions on /var/lib/teleport, but maybe we should consider to change that
https://github.com/giantswarm/cluster/blob/7382a52e2861cc78548d3e98d4ab204eda696cc5/helm/cluster/files/etc/teleport.yaml#L3

I debuged an issue in alba/seu01 where disk space is low on a node.

Common storage for pods is under /var/lib/kubelet on CAPA but there we also store teleport sessions.

When running out of disk we might have an issue that we cannot login on that nodes anymore due to

Original Error: *trace.AccessDeniedError failed to execute command /var/lib/teleport/log/upload/streaming/default/multi error:  no space left on device

I think we should fix that ASAP

Slack Thread: https://gigantic.slack.com/archives/C02FL4EAADD/p1733322446643659

Solution:

• Gather insights how much data we store for teleport (/var/lib/teleport)
• Changing it root directory to isolate this critical component from pod storage abuse, by default we have ~5G for root or we create a separate disk like /var/lib/kubelet if we need more space

[stone-z]

Merged, waiting for release