feat: add reset chain nonces msg

[skosito]

Description

Cherry picks commits for new message from #1912 (NOTE: without upgrade handler part).

There are some differences here compared to #1912 -ResetChainNonces and related tests are modified here to use authority module, which was not available on v14.0.1.

Closes: #1911

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Include instructions and any relevant details so others can reproduce.

• Tested CCTX in localnet
• Tested in development environment
• Go unit tests
• Go integration tests
• Tested via GitHub Actions

Checklist:

• I have added unit tests that prove my fix feature works

[github-actions]

!!!WARNING!!!
nosec detected in the following files: x/observer/keeper/msg_server_reset_chain_nonces.go

Be very careful about using #nosec in code. It can be a quick way to suppress security warnings and move forward with development, it should be employed with caution. Suppressing warnings with #nosec can hide potentially serious vulnerabilities. Only use #nosec when you're absolutely certain that the security issue is either a false positive or has been mitigated in another way.

Only suppress a single rule (or a specific set of rules) within a section of code, while continuing to scan for other problems. To do this, you can list the rule(s) to be suppressed within the #nosec annotation, e.g: /* #nosec G401 */ or //#nosec G201 G202 G203
Broad #nosec annotations should be avoided, as they can hide other vulnerabilities. The CI will block you from merging this PR until you remove #nosec annotations that do not target specific rules.

Pay extra attention to the way #nosec is being used in the files listed above.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.43%. Comparing base (39bca23) to head (1264a47).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1919      +/-   ##
===========================================
+ Coverage    48.16%   48.43%   +0.26%     
===========================================
  Files          233      235       +2     
  Lines        13322    13377      +55     
===========================================
+ Hits          6417     6479      +62     
+ Misses        6463     6456       -7     
  Partials       442      442              

Files	Coverage Δ
x/observer/keeper/msg_server_reset_chain_nonces.go	100.00% <100.00%> (ø)
x/observer/types/message_reset_chain_nonces.go	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes