DM-45701: Move dotTools from ctrl_mpexec

[timj]

Unchanged apart from imports and removal of call to toExpandedPipeline.

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Attention: Patch coverage is 67.69912% with 73 lines in your changes missing coverage. Please review.

Project coverage is 80.01%. Comparing base (89d1b78) to head (ff55416).

Files	Patch %	Lines
python/lsst/pipe/base/dot_tools.py	52.59%	60 Missing and 13 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #435      +/-   ##
==========================================
- Coverage   80.22%   80.01%   -0.22%     
==========================================
  Files          96       98       +2     
  Lines       10975    11201     +226     
  Branches     2099     2145      +46     
==========================================
+ Hits         8805     8962     +157     
- Misses       1823     1881      +58     
- Partials      347      358      +11     

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