replace growpart with systemd repart

[gehoern]

A basic feature of a cloud image is: it grows to the disk size it is located on.

Actually this is done via an updated (corrected and more versatile) growpart script in initram. I think the more future proof and even more versatile approach would be to use repart from systemd.

The problem here is repart is not yet part of the debian systemd (as of version 245)
All initial tests have to be done with a recompiled systemd for now

[marwinski]

@gehoern still relevant?

[gehoern]

if repart is used and growpart with all its dependencies is removed, then please close this ticket!

[chrinorse]

I can confirm that growpart is not used anymore, I removed the already out commented package cloud-guest-utils from the cloud and metal feature.