photoz tutorial to use LSST paths

[gitosaurus]

Closes #971 .

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[github-actions]

Before [f79d1a0]	After [398a78b]	Ratio	Benchmark (Parameter)
77.8±2ms	80.0±2ms	1.03	benchmarks.time_kdtree_crossmatch
23.2±0.2ms	23.6±0.5ms	1.02	benchmarks.time_box_filter_on_partition
6.33±0s	6.41±0.02s	1.01	benchmarks.time_create_large_catalog
950±10ms	961±6ms	1.01	benchmarks.time_create_midsize_catalog
37.7±1ms	38.1±1ms	1.01	benchmarks.time_polygon_search

Click here to view all benchmarks.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.64%. Comparing base (f79d1a0) to head (7c48510).
⚠️ Report is 121 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #972   +/-   ##
=======================================
  Coverage   95.64%   95.64%           
=======================================
  Files          54       54           
  Lines        2504     2504           
=======================================
  Hits         2395     2395           
  Misses        109      109           

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