fix: fix x/foundation EndBlocker

[0Tech]

Description

This patch will fix EndBlocker() of x/foundation and add the corresponding unit tests.

Checklist:

• I followed the contributing guidelines and code of conduct.
• I have added a relevant changelog to CHANGELOG.md
• I have added tests to cover my changes.
• I have updated the documentation accordingly.
• I have updated API documentation client/docs/swagger-ui/swagger.yaml

[codecov]

Codecov Report

Merging #712 (6f8569b) into main (289ca6b) will increase coverage by 0.03%.
The diff coverage is 89.58%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #712      +/-   ##
==========================================
+ Coverage   61.83%   61.87%   +0.03%     
==========================================
  Files         874      874              
  Lines       98557    98577      +20     
==========================================
+ Hits        60944    60991      +47     
+ Misses      33982    33945      -37     
- Partials     3631     3641      +10     

Impacted Files	Coverage Δ
x/foundation/keeper/proposal.go	78.40% <62.50%> (+13.46%)	⬆️
x/foundation/keeper/keys.go	97.95% <95.00%> (-2.05%)	⬇️
crypto/keys/internal/ecdsa/privkey.go	82.45% <0.00%> (-1.76%)	⬇️
x/token/msgs.go	32.99% <0.00%> (-1.53%)	⬇️
x/collection/msgs.go	40.18% <0.00%> (+0.18%)	⬆️
x/foundation/keeper/tally.go	69.23% <0.00%> (+11.53%)	⬆️
x/foundation/keeper/abci.go	75.00% <0.00%> (+37.50%)	⬆️

[dudong2]

LGTM