DM-44648: Allow conflicting module paths to be resolved late

[natelust]

When instantiating a pipeline that contains imports, allow the system to resolve conflicting module paths of tasks late. This allows the same task imported from a different path to still resolve as the same.

Checklist

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

[codecov]

Codecov Report

Attention: Patch coverage is 76.11940% with 32 lines in your changes missing coverage. Please review.

Project coverage is 80.17%. Comparing base (3934ca3) to head (9c5f990).
Report is 19 commits behind head on main.

Files	Patch %	Lines
python/lsst/pipe/base/tests/simpleQGraph.py	47.36%	20 Missing ⚠️
python/lsst/pipe/base/pipelineIR.py	80.43%	5 Missing and 4 partials ⚠️
python/lsst/pipe/base/pipeline.py	50.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #421      +/-   ##
==========================================
- Coverage   80.92%   80.17%   -0.75%     
==========================================
  Files          95       97       +2     
  Lines       10818    11099     +281     
  Branches     2064     2118      +54     
==========================================
+ Hits         8754     8899     +145     
- Misses       1718     1849     +131     
- Partials      346      351       +5     

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[TallJimbo]

Code looks fine, but codecov has spotted some logic branches the new tests didn't cover, and it doesn't look at first glance like it'd be hard to include them.