Improve server listing performance

[databus23]

Instead of listing all servers of a project we use a name filter with the regex ^(kks-?)$KLUSTERNAME-$POOLNAME for the name attribute. In addition we also process the pages individually when filtering through the returned servers. This should avoid listing thousands of servers from s4 projects on a constant basis.

CAREFUL: This needs extra special testing and careful review. If the listing is somehow filtering out valid kubernikus nodes launchctl will spawn new servers until the quota is exceeded.

[stale[bot]]

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