Shorten Hetzners node names with hex repr

[ByteAlex]

This PR doesn't change or adds any functionality, it's a pure visual change.
Node names with the Hetzner Cloud Provider used to have a long name of random numbers. To shorten those names this PR aims to change the random number to a hex representation.

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Alex (3a8064d)

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[ByteAlex]

/assign @aleksandra-malinowska

[ByteAlex]

/check-cla

[ByteAlex]

Hi @aleksandra-malinowska
This PR has been sitting for a bit, so I wanted to follow up and ask when you could get to a review?
Thank you!

[ByteAlex]

Hey @aleksandra-malinowska @feiskyer,
I just wanted to check in, if there's any update regarding this?

[feiskyer]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ByteAlex, feiskyer

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