Update ehrdata to adjust for anndata v0.12.13

[eroell]

Update ehrdata to adjust for anndata v0.12.13 and newer

Fixes #239

Details
Only internal changes that users should not be affected by.

• AlignedMappingProperty3D(Layers3D) instead of the broken AlignedMappingProperty3D("layers", Layers3D)
• Remove dtype kwarg (anndata dropped it).
• The 3D-X validation in the X setter (_validate_array_3d, new_n_t, tem refresh)

Testing Details
These changes are tested upon a range of past and recent anndata versions:

• A new testing job test-core with minimal dependencies in the CI can pick up the latest anndata release as the environment only imports minimal dependencies (e.g. no lamindb, no vitessce, which have upper bounds on anndata). This additional check is introduced as compatibility with latest anndata is a priority.
• The full ehrdata testing suite as of today tests with anndata==0.12.10, which is due to lamindb being included which currently restricts to anndata<=0.12.10.
• The ehrapy testing suite which runs on ehrapy tests with the latest anndata==0.12.14
• Locally, I tested this also with anndata==0.12.6.