chore: final BE wiring for grants

[thelostone-mc]

Description

• remove random data as the algorithm has changed
• filter contribution as +ve and -ve contributions
• update code to ensure -ve voting is taken into account
• update check to ensure algorithm runs when a grant has no -ve voting

[codecov]

Codecov Report

Merging #6268 into grants_round_5 will increase coverage by 0.30%.
The diff coverage is 10.34%.

@@                Coverage Diff                 @@
##           grants_round_5    #6268      +/-   ##
==================================================
+ Coverage           27.98%   28.29%   +0.30%     
==================================================
  Files                 278      278              
  Lines               26697    25539    -1158     
  Branches             4192     3745     -447     
==================================================
- Hits                 7472     7226     -246     
+ Misses              18894    18031     -863     
+ Partials              331      282      -49     

Impacted Files	Coverage Δ
app/grants/management/commands/estimate_clr.py	0.00% <0.00%> (ø)
app/grants/clr.py	14.65% <10.00%> (-1.02%)	⬇️
app/grants/views.py	16.44% <14.28%> (+0.25%)	⬆️
app/dashboard/utils.py	42.23% <0.00%> (-2.10%)	⬇️
app/dashboard/views.py	11.33% <0.00%> (-1.77%)	⬇️
app/grants/admin.py	44.89% <0.00%> (-1.67%)	⬇️
app/retail/emails.py	22.41% <0.00%> (-1.30%)	⬇️
app/marketing/mails.py	11.98% <0.00%> (-0.04%)	⬇️
app/grants/urls.py	100.00% <0.00%> (ø)
...rketing/management/commands/no_applicants_email.py	0.00% <0.00%> (ø)
... and 4 more

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[owocki]

thanks