Update pytest to generate a client fixture

[ayushdg]

Removes the distributed.utils_test fixtures from conftest and creates a new fixture to generate the client.
The primary motivation for this is that the client fixture from distributed also resets all non dask configurations that impacts changes in #392

[codecov-commenter]

Codecov Report

Merging #398 (a818de8) into main (07f1649) will decrease coverage by 6.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #398      +/-   ##
==========================================
- Coverage   95.48%   89.09%   -6.39%     
==========================================
  Files          68       68              
  Lines        2987     3337     +350     
  Branches      554      653      +99     
==========================================
+ Hits         2852     2973     +121     
- Misses         83      289     +206     
- Partials       52       75      +23     

Impacted Files	Coverage Δ
dask_sql/_version.py	34.00% <0.00%> (-66.00%)	⬇️
dask_sql/__init__.py	100.00% <0.00%> (ø)
dask_sql/mappings.py	100.00% <0.00%> (ø)
dask_sql/physical/rex/core/call.py	99.12% <0.00%> (+<0.01%)	⬆️
dask_sql/physical/rel/custom/tables.py	85.71% <0.00%> (+2.38%)	⬆️

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[ayushdg]

The dask cluster tests seem to be failing but I can't reproduce locally @charlesbluca any suggestions?

[ayushdg]

Connected with @charlesbluca and thanks for the commit to fix the errors! Do you think it makes sense to merge this and open up an issue to discuss whether Dask-sql should indeed support running on a cluster which doesn't have dask-sql installed?

[ayushdg]

@charlesbluca I've added a note around the fugue test that was disabled on an external cluster for the time being. Is this good to merge?

[charlesbluca]

Yup, I think this should be good to merge in - thanks for the work here @ayushdg 🙂