Naive std bounties cross chain

[danlipert]

Description

This PR is a simple, but inelegant fix for issues where cross chain bounties have the wrong projects attached

Refers/Fixes

Testing

Tested locally w/ prod data

[codecov]

Codecov Report

Merging #6302 into stable will decrease coverage by 0.07%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           stable    #6302      +/-   ##
==========================================
- Coverage   28.24%   28.16%   -0.08%     
==========================================
  Files         278      278              
  Lines       25745    25950     +205     
  Branches     3786     3875      +89     
==========================================
+ Hits         7271     7310      +39     
- Misses      18191    18344     +153     
- Partials      283      296      +13

Impacted Files	Coverage Δ
app/dashboard/models.py	50.53% <100%> (+0.09%)	⬆️
...eting/management/commands/assemble_leaderboards.py	40.48% <0%> (ø)	⬆️
app/dashboard/views.py	11.31% <0%> (ø)	⬆️
...rketing/management/commands/no_applicants_email.py	0% <0%> (ø)	⬆️
app/grants/views.py	15.94% <0%> (+0.47%)	⬆️

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