Remove Dataproc from AncestryPlots Stage

[michael-harper]

Continuing efforts to remove Dataproc from the large cohorts pipeline (similar to #878 but more similar to #609, #621, and #626).

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.50%. Comparing base (3d7b16c) to head (6475a2a).
⚠️ Report is 371 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #897   +/-   ##
=======================================
  Coverage   78.50%   78.50%           
=======================================
  Files          10       10           
  Lines        1791     1791           
=======================================
  Hits         1406     1406           
  Misses        385      385           

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