Discontinue legacy schema

[perolavsvendsen]

Current, both old and new schemas are in prod. Should discontinue the old.

• Deploy version of fmu-dataio that uses Pydantic
  • Komodo
  • RMS

When all workflows (?) are producing "new" metadata, discontinue old schema.

• Sumo OK

• fmu-dataio OK

• Discontinue and remove legacy schema

[mferrera]

Dependencies we plan to tidy up before returning to a regular release schedule and discontinuing the legacy schema:

• All providers return Pydantic models
  • Use pydantic model for metadata from FmuProvider #572
  • Return object metadata as a Pydantic model #564
  • Use top-level types for DerivedObjectDescriptor #565
  • ...
• Optional: Establish a provider interface #573
• ENH: include (fault) surfaces from FaultRoom plugin #492

After these issues are cleaned up we will begin testing on real models. It may also be a good time to start adding more integration tests.