Fix wrapped mass assignment with unguarded models

[dennis-koster]

When using the translations_wrapper config option in combination with a model factory, an SQL error is thrown.

Illuminate\Database\QueryException: SQLSTATE[HY000]: General error: 1 table vegetables has no column named _translation_wrapper (Connection: testing, SQL: insert into "vegetables" ("quantity", "_translation_wrapper", "updated_at", "created_at") values (5, ?, 2024-09-16 08:52:41, 2024-09-16 08:52:41))

This has to do with the fact that eloquent model factories unguard the model before performing a mass assignment. The wrapped attribute is not removed from the attributes array so an attempt is made to insert that into the base model as wel.

This MR fixes that issue. I have accompanied the proposed code with a test to demonstrate its proper functioning.

[dennis-koster]

@Gummibeer Could you please take a look at this?