openapi3: add support for UUID v6-8

[alexg-axis]

The current UUID format regex matches UUID version 1-5 in accordance to
the current RFC 4122.

There's a draft to update the spec, which adds three new versions. The
intention of this PR is to add support for these versions.

See: https://datatracker.ietf.org/doc/html/draft-ietf-uuidrev-rfc4122bis-01.

[alexg-axis]

I didn't find any reference stating that OpenAPI strictly supports UUID v1-5, hence I though it would be in scope to add support here directly.

[fenollp]

Well this isn't the same RFC so I'm more encline to not update this var but instead to add a new one with the bis01 name. Is that fine with you?

[alexg-axis]

Well this isn't the same RFC so I'm more encline to not update this var but instead to add a new one with the bis01 name. Is that fine with you?

Do you still think that the uuid format should use the new bis01 name? If so, what would be the use of keeping the current var as well?

[zekth]

Well this isn't the same RFC so I'm more encline to not update this var but instead to add a new one with the bis01 name. Is that fine with you?

Do you still think that the uuid format should use the new bis01 name? If so, what would be the use of keeping the current var as well?

I think we might want to keep both esp is the consumer app have to support v1-5 and not v8. Eg: v8 has introduced uuid.Max also which is not supported in other implementations.

[fenollp]

Please, don't modify current behavior. Add a second var with bis01 suffix and test behavior (covered, not covered, covered by both).

[fenollp]

@alexg-axis Hey there. Do you need help moving this forward?