infra: remove doc dependencies from the test list and add to their ow…

[AbeCoull]

…n extra dependency set

Issue #, if available:

This removes the dependencies installed within the start up for tests. Minor change but should have better dependency structure for the different tox envs.

Description of changes:

Testing done:

Merge Checklist

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (43d0c7e) to head (3f60f9a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1037   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          135       135           
  Lines         9033      9033           
  Branches      2029      2029           
=========================================
  Hits          9033      9033           

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