Swap legacy fmu_results.json -> fmu_results_legacy.json, fmu_meta.json -> fmu_results.json

[mferrera]

Depends upon Sumo verifying the latest Pydantic schema is validating A-OK across the board.

We must also ensure that this change will be reflected smoothly in Radix. Double check if any updates to schema/app/install-schema-files.sh or schema/app/fmu-schemas.conf or the Dockerfile/radix config are required (there shouldn't be).

We will also need to update a line in the schema that is emitted.

fmu-dataio/src/fmu/dataio/datastructure/meta/meta.py

Line 758 in 113fcaf

"$id": "fmu_meta.json",

[mferrera]

This change, at least from the Radix promote-to-prod perspective, should not happen until both the newest release is in the RMS env and Komodo (August).

[mferrera]

Part of #571

[mferrera]

Closing this: we will discontinue fmu_results.json and keep the new schema as fmu_meta.json as it is already being used by Sumo for validation.