[DA] Planetscale engine tests: one2m_mix_required_writable_readable

[miguelff]

This is a subcluster of failures after having enabled planetscale tests in https://github.com/prisma/prisma-engines/pull/4423

Failing tests in this cluster:

writes::relations::compound_fks_mixed_requiredness::compound_fks::one2m_mix_required_writable_readable

Please follow this process