[Bug] `spatialdata==0.3.0` pins `zarr<3` which is incompatible with latest `numcodecs` (0.16.0)

[ryan-williams]

Describe the bug
Per zarr-developers/zarr-python#2963.

• We depend on spatialdata 0.3.0, which pins zarr<3.
• zarr<3 references numcodecs.blosc symbols that were removed in numcodecs 0.16.0.

This resulted in import zarr raising ImportError in unrelated GHA on #3916:

  File "/home/runner/work/TileDB-SOMA/TileDB-SOMA/venv-soma/lib/python3.11/site-packages/zarr/convenience.py", line 8, in <module>
    from zarr._storage.store import data_root, meta_root, assert_zarr_v3_api_available
  File "/home/runner/work/TileDB-SOMA/TileDB-SOMA/venv-soma/lib/python3.11/site-packages/zarr/_storage/store.py", line 10, in <module>
    from zarr.meta import Metadata2, Metadata3
  File "/home/runner/work/TileDB-SOMA/TileDB-SOMA/venv-soma/lib/python3.11/site-packages/zarr/meta.py", line 10, in <module>
    from zarr.util import json_dumps, json_loads
  File "/home/runner/work/TileDB-SOMA/TileDB-SOMA/venv-soma/lib/python3.11/site-packages/zarr/util.py", line 34, in <module>
    from numcodecs.blosc import cbuffer_sizes, cbuffer_metainfo
ImportError: cannot import name 'cbuffer_sizes' from 'numcodecs.blosc' (/home/runner/work/TileDB-SOMA/TileDB-SOMA/venv-soma/lib/python3.11/site-packages/numcodecs/blosc.cpython-311-x86_64-linux-gnu.so)
Error: Process completed with exit code 1.

To Reproduce
See GHA example.

Versions (please complete the following information):

• TileDB-SOMA version: main
• Language and language version: Python 3.11 (but probably all versions)
• OS: macOS, Ubuntu

[ryan-williams]

• This broke this RTD build
• [python] setup.py: remove deprecated License :: from classifiers #3916 contains a workaround to unbreak us
• Pin numcodecs to < 0.16 to fix v2 zarr-developers/zarr-python#2965 will fix it on their end (we can remove our workaround later)