DM-33260 hotfix: make lsstimport optional

[tgoldina]

Hotfix for missed lsstimport in DM-33260.

Checklist

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

[timj]

Looks good. I guess this worked before because the lsst/__init__.py can be picked up from daf_butler or utils but depending on import order you can hit the pipe_base one instead.

[tgoldina]

Yes, I was installing pipe_base last.

[codecov]

Codecov Report

Merging #227 (ef7eb49) into main (2dc972b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #227   +/-   ##
=======================================
  Coverage   71.77%   71.77%           
=======================================
  Files          48       48           
  Lines        6148     6148           
  Branches     1188     1188           
=======================================
  Hits         4413     4413           
  Misses       1518     1518           
  Partials      217      217           

Impacted Files	Coverage Δ
python/lsst/pipe/base/graph/graph.py	81.17% <0.00%> (ø)

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