feat: Add totals to nominee feedback page

[pselkirk]

Fixes #4727

[richsalz]

FWIW, this is a bit cleaner than #5406, but that was held up for lack of a test.

[codecov]

Codecov Report

Merging #5977 (ad71d61) into main (09f3477) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5977      +/-   ##
==========================================
- Coverage   88.67%   88.63%   -0.05%     
==========================================
  Files         288      288              
  Lines       40001    40014      +13     
==========================================
- Hits        35471    35466       -5     
- Misses       4530     4548      +18     

Impacted Files	Coverage Δ
ietf/doc/utils.py	87.15% <100.00%> (+0.01%)	⬆️
ietf/nomcom/templatetags/nomcom_tags.py	70.83% <100.00%> (+3.64%)	⬆️
ietf/submit/forms.py	79.02% <100.00%> (+0.03%)	⬆️

... and 3 files with indirect coverage changes