This PR adapts teh deleteOneField to make sure morph relations can be
deleted, either
- from a relation type,
- or from a morph relation type (which is the most obvious case).
This PR covers
- the deletion of fieldMetadata
- and the migrationof workspace schemas, by using the already existing
definition of relation migrations
This PR implements a new test suite: "Delete Object metadata with morph
relation" and completes the other test suites for FieldMetadata and
ObjectMetadata creation/deletion.
Last, we added a nitpick from @paul I forgot on a previous PR on
process-nested-realtion-v2
Fixes https://github.com/twentyhq/core-team-issues/issues/1197
Guillim