[BUG] add allow threads for io pool operations

[samster25]

fixes deadlock with glob in the following test

DAFT_MICROPARTITIONS=1 DAFT_V2_SCANS=1 pytest --ignore tests/dataframe/test_creation.py -k "test_tpch_q6[gen_tpch:2]"

[codecov]

Codecov Report

Merging #1580 (e049ceb) into main (e176f2e) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1580   +/-   ##
=======================================
  Coverage   84.85%   84.85%           
=======================================
  Files          54       54           
  Lines        5165     5165           
=======================================
  Hits         4383     4383           
  Misses        782      782