fix: allow up to one direct sign in multi sign tx

[dudong2]

Description

In the current multi sign tx, if there is even one direct mode sign, the sign will fail.
It changed to allows one direct sign even multi sign tx .

ref. https://github.com/cosmos/cosmos-sdk/pull/10683/files
closes: #XXXX

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 #708 (b55f8ef) into main (289ca6b) will increase coverage by 0.02%.
The diff coverage is 63.15%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #708      +/-   ##
==========================================
+ Coverage   61.83%   61.86%   +0.02%     
==========================================
  Files         874      874              
  Lines       98557    98585      +28     
==========================================
+ Hits        60944    60986      +42     
- Misses      33982    33988       +6     
+ Partials     3631     3611      -20     

Impacted Files	Coverage Δ
client/tx/tx.go	33.22% <62.16%> (+2.81%)	⬆️
x/auth/client/testutil/suite.go	96.61% <100.00%> (ø)
x/wasm/keeper/keeper.go	85.80% <0.00%> (-0.37%)	⬇️
x/token/msgs.go	34.51% <0.00%> (ø)
x/collection/msgs.go	43.33% <0.00%> (+3.33%)	⬆️
x/token/validation.go	90.90% <0.00%> (+18.18%)	⬆️

[0Tech]

LGTM