chore: modify missing changes of converting to tendermint

[zemyblue]

Description

Modify missing changes of converting to tendermint

• revert Ostracon slashing changes (revert fix: introduce VoterSetCounter #347)
• revert block converting

related: #1177

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 #1179 (d235d28) into main (e5fdd7a) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1179      +/-   ##
==========================================
- Coverage   69.74%   69.74%   -0.01%     
==========================================
  Files         643      643              
  Lines       67263    67255       -8     
==========================================
- Hits        46913    46906       -7     
+ Misses      18177    18176       -1     
  Partials     2173     2173              

Files	Coverage Δ
x/auth/tx/service.go	70.83% <100.00%> (-1.17%)	⬇️
x/slashing/keeper/hooks.go	69.76% <100.00%> (ø)
x/slashing/keeper/infractions.go	85.00% <100.00%> (-0.15%)	⬇️

... and 1 file with indirect coverage changes