V3.12.x.mergeback

[pp-mo]

Mergeback after 3.12.0rc0 release,
re-establishes whatsnew with new 3.12.rst and latest.rst

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.80%. Comparing base (99dbd26) to head (60e6793).
Report is 76 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6364   +/-   ##
=======================================
  Coverage   89.80%   89.80%           
=======================================
  Files          90       90           
  Lines       23752    23752           
  Branches     4418     4418           
=======================================
  Hits        21331    21331           
  Misses       1672     1672           
  Partials      749      749           

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[ESadek-MO]

Looks good to me, thanks @pp-mo