feat(json-schema): mutualize json schema between formats

[soyuka]

Q	A
Branch?	main
Tickets	starts fixing #6485
License	MIT

Instead of generating twice a definition for 2 different formats, we generate the json one and reference the json format inside the jsonld format:

https://gist.github.com/soyuka/20d0d216c3fce1b68165dbbf58381e02

When generating a single resource on our TestBundle we lower the OpenAPI file size quite a bit:

• 12K on 4.5
• 8.0K with this patch

Left to be done:

• check if serialization groups work
• fix feat(jsonschema): make JSON-LD specific properties required only in the schema for output #6485
• tests