refactor: remove redundant granter from x/foundation events

[0Tech]

Description

This patch will remove the redundant field in the events.

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 #757 (4588c9b) into main (ea17c5a) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #757   +/-   ##
=======================================
  Coverage   62.15%   62.16%           
=======================================
  Files         879      879           
  Lines       99371    99366    -5     
=======================================
+ Hits        61767    61771    +4     
- Misses      33979    33983    +4     
+ Partials     3625     3612   -13     

Impacted Files	Coverage Δ
x/foundation/keeper/grant.go	72.04% <ø> (-1.43%)	⬇️
x/token/msgs.go	49.42% <0.00%> (ø)
x/collection/msgs.go	53.57% <0.00%> (+0.14%)	⬆️
x/token/validation.go	85.45% <0.00%> (+14.54%)	⬆️