JoinTypes.__members__ empty in Python 3.13

[LucaMarconato]

Running this code with Python 3.11 shows

from spatialdata._core.query.relational_query import JoinTypes; print(JoinTypes._member_names_)
from spatialdata._core.query.relational_query import MatchTypes; print(MatchTypes._member_names_)

['left', 'left_exclusive', 'inner', 'right', 'right_exclusive']
['left', 'right', 'no']

While running it with Python 3.13 shows

[]
['left', 'right', 'no']

Leading to an exception when the join functions are called (for instance from spatialdata-plot).

We need to:

• fix this
  • I'll start with a quick fix CC @melonora Fix JoinTypes.__dict__ empty python 3.13 #853
  • we should see if we can make a more robust fix (the hotfix may be enough)
• add Python 3.13 to the CI
• ideally try to make tests faster to make the CI run faster.