Re-enable the hive tests

[nils-braun]

Due to me being stupid, there was no hive test in the moment.
Additionally, the move to a new git space disabled all coverage tests and display of the results.
We are fixing both here and bring the coverage to 100% back again.

[codecov-commenter]

Codecov Report

Merging #221 (be484d8) into main (0c3a6a1) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              main      #221    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files           64        64            
  Lines         2470      2589   +119     
  Branches       340       362    +22     
==========================================
+ Hits          2470      2589   +119     

Impacted Files	Coverage Δ
dask_sql/physical/rel/logical/filter.py	100.00% <ø> (ø)
dask_sql/context.py	100.00% <100.00%> (ø)
dask_sql/input_utils/hive.py	100.00% <100.00%> (ø)
dask_sql/physical/rel/custom/create_experiment.py	100.00% <100.00%> (ø)
dask_sql/physical/rel/custom/create_model.py	100.00% <100.00%> (ø)
dask_sql/physical/rel/custom/export_model.py	100.00% <100.00%> (ø)
dask_sql/physical/rel/logical/__init__.py	100.00% <100.00%> (ø)
dask_sql/physical/rel/logical/join.py	100.00% <100.00%> (ø)
dask_sql/physical/rel/logical/window.py	100.00% <100.00%> (ø)
dask_sql/physical/rex/core/__init__.py	100.00% <100.00%> (ø)
... and 5 more

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[nils-braun]

The dark-cluster test fails until the dask docker image is also updated, so we can proceed here anyways.