fix: check pubkey type from validator params

[dudong2]

Description

Currently, the ValidateValidatorParams function does not check the pubkey type.
So, no error is returned even if an illegal pubkey type is passed as param.
closes: #723

Motivation and context

How has this been tested?

Screenshots (if appropriate):

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 #724 (d6cb662) into main (502bfd7) will increase coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #724      +/-   ##
==========================================
+ Coverage   61.97%   61.98%   +0.01%     
==========================================
  Files         874      874              
  Lines       98797    98803       +6     
==========================================
+ Hits        61225    61246      +21     
+ Misses      33928    33924       -4     
+ Partials     3644     3633      -11     

Impacted Files	Coverage Δ
baseapp/params.go	100.00% <100.00%> (ø)
x/token/msgs.go	34.51% <0.00%> (-4.07%)	⬇️
x/collection/collection.go	80.35% <0.00%> (+1.78%)	⬆️
x/collection/msgs.go	41.66% <0.00%> (+3.33%)	⬆️
x/token/validation.go	92.72% <0.00%> (+3.63%)	⬆️

[0Tech]

LGTM

[tkxkd0159]

LGTM