chore: refactor to use snake_case in proto (backport #1396)

[mergify]

Description

closes: #XXXX

• Use snake_case in proto

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

---

This is an automatic backport of pull request #1396 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 59f7256 has failed:

On branch mergify/bp/release/v0.49.x/pr-1396
Your branch is up to date with 'origin/release/v0.49.x'.

You are currently cherry-picking commit 59f7256ca.
  (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:   CHANGELOG.md
	modified:   docs/core/proto-docs.md
	modified:   proto/lbm/fswap/v1/query.proto
	modified:   x/fswap/types/query.pb.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   client/docs/swagger-ui/swagger.yaml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.04%. Comparing base (de3499f) to head (9d64c30).

❗ Current head 9d64c30 differs from pull request most recent head c104fb3

Please upload reports for the commit c104fb3 to get more accurate results.

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v0.49.x    #1397   +/-   ##
================================================
  Coverage            69.04%   69.04%           
================================================
  Files                  671      671           
  Lines                69299    69299           
================================================
  Hits                 47846    47846           
  Misses               19167    19167           
  Partials              2286     2286           

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.04%. Comparing base (de3499f) to head (c104fb3).

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v0.49.x    #1397   +/-   ##
================================================
  Coverage            69.04%   69.04%           
================================================
  Files                  671      671           
  Lines                69299    69299           
================================================
  Hits                 47846    47846           
  Misses               19167    19167           
  Partials              2286     2286