Allow REST endpoint to query txs with multisig (bp #8730)

[mergify]

This is an automatic backport of pull request #8730 done by Mergify.

Cherry-pick of 3832860 has failed:

On branch mergify/bp/release/v0.41.x/pr-8730
Your branch is up to date with 'origin/release/v0.41.x'.

You are currently cherry-picking commit 383286026.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   x/auth/client/rest/rest_test.go
	modified:   x/auth/legacy/legacytx/stdsign.go
	modified:   x/auth/legacy/legacytx/stdtx.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   CHANGELOG.md

To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

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[codecov]

Codecov Report

Merging #8731 (54d9ee5) into release/v0.41.x (2a5818c) will increase coverage by 0.03%.
The diff coverage is 62.50%.

@@                 Coverage Diff                 @@
##           release/v0.41.x    #8731      +/-   ##
===================================================
+ Coverage            61.93%   61.96%   +0.03%     
===================================================
  Files                  611      611              
  Lines                35250    35382     +132     
===================================================
+ Hits                 21831    21926      +95     
- Misses               11136    11156      +20     
- Partials              2283     2300      +17     

Impacted Files	Coverage Δ
baseapp/grpcserver.go	2.70% <0.00%> (+0.13%)	⬆️
store/rootmulti/store.go	66.05% <0.00%> (ø)
testutil/network/network.go	90.54% <0.00%> (ø)
x/auth/legacy/legacytx/stdsign.go	82.97% <ø> (ø)
x/staking/keeper/keeper.go	56.66% <ø> (-1.40%)	⬇️
x/staking/keeper/validator.go	80.52% <ø> (+0.03%)	⬆️
client/grpc_query.go	29.16% <40.00%> (+0.90%)	⬆️
baseapp/grpcrouter.go	80.00% <50.00%> (-6.05%)	⬇️
x/auth/legacy/legacytx/stdtx.go	80.85% <50.00%> (-1.38%)	⬇️
x/auth/client/cli/tx_multisign.go	64.67% <68.46%> (+2.99%)	⬆️
... and 12 more

[amaury1093]

@alessio Did you remove my entry in the changelog bugfix section on purpose? Are you planning to create that section in one run for all backport PRs?

[alessio]

@alessio Did you remove my entry in the changelog bugfix section on purpose? Are you planning to create that section in one run for all backport PRs?

Yes correct

[alessio]

Hold on - tests are failing

[fdymylja]

There are syntax errors on rest tests.

dismissing