FIX: Propagate errors from run_without_submitting

[mgxd]

Came up in nipreps/fmriprep#3611 , nipreps/nibabies#392

This adds a _run_errors attribute to DistributedPluginBase which is only utilized during the run() lifecycle, to ensure any encountered errors are properly reported.

Each distributed plugin may need to be updated, this only touches on MultiProc and LegacyMultiProc.

[effigies]

Looks good. I can't readily think of something cleaner.

[codecov]

Codecov Report

❌ Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 72.89%. Comparing base (2b671ab) to head (7ba9f4a).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
nipype/pipeline/plugins/base.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3745      +/-   ##
==========================================
+ Coverage   72.88%   72.89%   +0.01%     
==========================================
  Files        1279     1279              
  Lines       59351    59366      +15     
==========================================
+ Hits        43256    43277      +21     
+ Misses      16095    16089       -6     

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