Align CPU types b/w SCS and Gaia-X

[garloff]

https://github.com/SovereignCloudStack/standards/blob/main/Standards/scs-0100-v3-flavor-naming.md
has this table for CPUs

Generation	i (Intel x86-64)	z (AMD x86-64)	a (AArch64)	r (RISC-V)
0	pre Skylake	pre Zen	pre Cortex A76	TBD
1	Skylake	Zen-1 (Naples)	A76/NeoN1 class	TBD
2	Cascade Lake	Zen-2 (Rome)	A78/x1/NeoV1 class	TBD
3	Ice Lake	Zen-3 (Milan)	Anext/NeoN2 class	TBD

while the flavor spec in Gaia-X has
exampleValues: [ 'Skylake-Server-v4', 'Icelake-Server-v4', 'Cascadelake-Server-v4', 'EPYC-Milan-v1', 'EPYC-Rome-v2' ]

We can translate this except for the -vN suffix in Gaia-X.

[garloff]

Obviously, the Gaia-X values don't necessarily need to match the SCS classification literally, but a unique 1:1 relationship would be nice.
E.g. -i1 = Skylake, -i3 = Icelake, -z2 = Rome, -a2 = Cortex-A78.

exampleValues: ['Skylake', 'Cascadelake', 'Icelake', 'Cascadelake', 'Naples', 'Rome', 'Milan', 'Cortex-A78']

The question is whether we need to disallow variants (like CometLake -> Skylake and Rocketlake -> Icelake)?

[anjastrunk]

duplicate to #63