fix: return NaN for all-NaN min/max

[orlp]

Fixes #15058.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.04%. Comparing base (f08914b) to head (25ab072).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15066      +/-   ##
==========================================
- Coverage   81.04%   81.04%   -0.01%     
==========================================
  Files        1338     1338              
  Lines      173771   173765       -6     
  Branches     2456     2456              
==========================================
- Hits       140832   140822      -10     
- Misses      32471    32476       +5     
+ Partials      468      467       -1     

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