feat: add is_clr_eligble option to a grant

[thelostone-mc]

Description

• add is_clr_eligible option to CLR which is defaulted to true
• fix minor UI bugs in grants
• update clr algo to fetch only grants which are eligible
• update content stating clr is not eligible when a grant is not eligible (on grants landing + grants detail + cart )
• added ability to toggle is is_clr_eligible via admin

@owocki + @danlipert -> made clr_prediction_curve a read only field in admin cause right now if you update a grant, since django admin can't read 2D array right and display it as flat string -> it messes up the data and stuff randomly breaks off
Until we figure that out -> It would be safer to update the curve via db (this was the same issue matt faced while updating the curve via admin)

Testing

https://share.vidyard.com/watch/ds4VLaLMxgfuQqNrjr3w2N?

[codecov]

Codecov Report

Merging #6923 into stable will increase coverage by 0.01%.
The diff coverage is 16.66%.

@@            Coverage Diff             @@
##           stable    #6923      +/-   ##
==========================================
+ Coverage   26.53%   26.55%   +0.01%     
==========================================
  Files         298      298              
  Lines       28673    28673              
  Branches     4191     4191              
==========================================
+ Hits         7608     7613       +5     
+ Misses      20795    20785      -10     
- Partials      270      275       +5     

Impacted Files	Coverage Δ
app/grants/admin.py	42.93% <ø> (ø)
app/grants/clr.py	0.00% <0.00%> (ø)
app/grants/tasks.py	17.20% <ø> (ø)
app/grants/views.py	18.96% <ø> (-0.15%)	⬇️
app/grants/models.py	45.75% <100.00%> (+0.09%)	⬆️
app/quests/views.py	16.22% <0.00%> (ø)
app/dashboard/views.py	10.61% <0.00%> (ø)
...rketing/management/commands/no_applicants_email.py	0.00% <0.00%> (ø)
...eting/management/commands/assemble_leaderboards.py	39.83% <0.00%> (ø)
app/dashboard/utils.py	41.51% <0.00%> (+0.92%)	⬆️

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