Mesh: Remove unnecessary wrapper_type_finalize logic

Mesh: Remove unnecessary wrapper_type_finalize logic

After some discussions and investigation over the last couple months,
it's not clear what the "wrapper type finalize" logic is necessary for.
For edit meshes and regular meshes, normals are calculated lazily when
building the draw cache.

Apart from the unnecessary complication for mesh GPU draw data
extraction, this code also causes normals to always be calculated
when turning an edit mesh wrapper into a regular mesh. However, those
normals are immediately discarded since the edit deform cache is deleted
in the next line.

Beyond the obvious simplification, the motivation for this change is to
avoid requesting write access on the evaluated mesh and cage mesh. This
works better with implicit sharing, allowing other improvements.

Pull Request: https://projects.blender.org/blender/blender/pulls/120066