ipam: netbox: factor out common api methods and unify error handling

ipam: netbox: factor out common api methods and unify error handling

Create a helper method that abstracts the common code used in making
netbox requests. Move all api_request incovations over to using the
helper method. This saves us from writing lots of repeated code.

This also updates the helpers and introduces error checking there.
Helpers didn't catch any errors and the invoking methods didn't as
well. This meant that functions with $noerr set to 1 would still error
out. We now pass $noerr to the helper functions and they behave the
same as the parent methods. This requires some additional checks in
the call sites of the helpers.

Also canonicalize all URLs, since Netbox does that and it saves us a
redirect.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
Tested-by: Hannes Duerr <h.duerr@proxmox.com>
Link: https://lore.proxmox.com/20250310085103.30549-1-s.hanreich@proxmox.com
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>