chore: Replace DispatchResultwithPostInfo with DispatchResult

[syan095]

Pull Request

Closes: PRO-1618

Checklist

Please conduct a thorough self-review before opening the PR.

• [x] I am confident that the code works.
• [x] I have written sufficient tests.
• [x] I have written and tested required migrations.
• [x] I have updated documentation where appropriate.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 91.00000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 70%. Comparing base (d5d847a) to head (b1c3325). Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
state-chain/pallets/cf-environment/src/mock.rs	0%	4 Missing :warning:
...te-chain/pallets/cf-threshold-signature/src/lib.rs	78%	4 Missing :warning:
state-chain/pallets/cf-validator/src/lib.rs	92%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #5255 +/- ## ====================================== Coverage 70% 70% ====================================== Files 486 483 -3 Lines 87289 86763 -526 Branches 87289 86763 -526 ====================================== - Hits 61297 61005 -292 + Misses 22695 22458 -237 - Partials 3297 3300 +3 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.