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 79.23077% with 27 lines in your changes missing coverage. Please review.

Project coverage is 82.08%. Comparing base (e430572) to head (c79df71).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
python/lsst/pipe/base/tests/simpleQGraph.py	54.54%	15 Missing ⚠️
python/lsst/pipe/base/pipelineIR.py	80.43%	5 Missing and 4 partials ⚠️
python/lsst/pipe/base/pipeline.py	57.14%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #421      +/-   ##
==========================================
- Coverage   82.09%   82.08%   -0.02%     
==========================================
  Files         107      108       +1     
  Lines       12995    13114     +119     
  Branches     1678     1693      +15     
==========================================
+ Hits        10668    10764      +96     
- Misses       1905     1926      +21     
- Partials      422      424       +2     

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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.