Fix bug when overriding committed role-types with newly defined role-types

[krishnangovindraj]

Usage and product changes

Fixes a bug which creates an invalid override when a committed role-type is overridden with a newly defined role-type.

Implementation

Updates TypeEdgeImpl.Persisted to treat overrides as TypeEdgeImpl.Buffered does - Writing to the transaction is delayed to the commit() method, by when the overridden vertex will have been translated.

fixes #6985

[vaticle-bot]

PR Review Checklist

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Trivial Change

• [x] This change is trivial and does not require a code or architecture review.

Code

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[flyingsilverfin]

Rebase, update dependency, and let's merge this one