Run tests whenever TMPDIR points to some folder with spaces in the name

[yarikoptic]

See #3604 for the motivation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.04%. Comparing base (bae6c55) to head (52cc9c4).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3605   +/-   ##
=======================================
  Coverage   73.04%   73.04%           
=======================================
  Files        1278     1278           
  Lines       59356    59356           
=======================================
  Hits        43359    43359           
  Misses      15997    15997           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[yarikoptic]

oh well, I guess since no actual dcm2niix is invoked -- all is good here besides a single test test_crashfile_creation leading to /opt/hostedtoolcache/Python/3.11.5/x64/bin/python: can't open file '/tmp/t': [Errno 2] No such file or directory