Align IaaS disk types between SCS and Gaia-X

[garloff]

The flavor spec doc (https://github.com/SovereignCloudStack/Docs/blob/main/Design-Docs/flavor-naming.md) has this list for disk types

Disk type	Meaning
n	Network shared storage (ceph/cinder)
h	Local disk (HDD: SATA/SAS class)
s	Local SSD disk
p	Local high-perf NVMe

whereas the Gaia-X flavor def (https://gitlab.com/gaia-x/technical-committee/service-characteristics/-/blob/76-brainstorming-on-infrastructure-service-offering-attribtues/single-point-of-truth/yaml/validation/flavor.yaml) has

exampleValues: [ 'ssd', 'hdd', 'NVMe']

We can translate this except that we lack the network characterization.

[garloff]

My suggestion is

exampleValues: [ 'network', 'hdd', 'ssd', 'nvme', '3dxpoint' ]

[anjastrunk]

Added @garloff proposes to Gaia-X upstream. See !190.