feat(campaign): create special allocations type

[lumtis]

Implementing special allocations structure and add it to campaign

• Type SpecialAllocations
• Add tests for type
• Add empty by default special allocations to campaign
• Update CampaignShares invariant to include special allocations

[codecov]

Codecov Report

Merging #786 (bb43e03) into develop (e1cca3e) will increase coverage by 0.05%.
The diff coverage is 7.06%.

❗ Current head bb43e03 differs from pull request most recent head 99d49b2. Consider uploading reports for the commit 99d49b2 to get more accurate results

@@             Coverage Diff             @@
##           develop     #786      +/-   ##
===========================================
+ Coverage    10.58%   10.63%   +0.05%     
===========================================
  Files          313      304       -9     
  Lines        73081    72563     -518     
===========================================
- Hits          7736     7719      -17     
+ Misses       65158    64659     -499     
+ Partials       187      185       -2     

Impacted Files	Coverage Δ
x/campaign/types/campaign.pb.go	0.51% <0.00%> (-0.05%)	⬇️
x/campaign/types/special_allocations.pb.go	1.40% <1.40%> (ø)
x/campaign/types/campaign.go	100.00% <100.00%> (ø)
x/campaign/types/special_allocations.go	100.00% <100.00%> (ø)
x/claim/types/params.go
x/claim/genesis.go
x/claim/types/genesis.pb.go
x/claim/types/tx.pb.go
x/claim/types/query.pb.gw.go
x/claim/keeper/params.go
... and 7 more

[giunatale]

I am pre-approving, pending answer to my question above. Ping me if I need to re-review this

[giunatale]

Unit tests are failing, it's not due to the usual port-binding issue.

[lumtis]

Simulation tests failing now with something we never had🤔

[aljo242]

We can go ahead and merge once unit tests pass.