Feat support alternative gas token

[yiweichi]

Purpose or design rationale of this PR

1. to support use alternative gas token
2. when using alternative gas token instead of Ether, check gas token balance of gasTokenGateway contract instead of Ether balance of scrollMessenger contracts

PR title

Your PR title must follow conventional commits (as we are doing squash merge for each PR), so it must start with one of the following types:

• feat: A new feature

Deployment tag versioning

Has tag in common/version.go been updated or have you added bump-version label to this PR?

• No, this PR doesn't involve a new deployment, git tag, docker image tag

Breaking change label

Does this PR have the breaking-change label?

• No, this PR is not a breaking change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.82%. Comparing base (f520420) to head (ede1be0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #124   +/-   ##
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  Coverage   40.82%   40.82%           
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  Files           5        5           
  Lines         605      605           
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  Hits          247      247           
  Misses        349      349           
  Partials        9        9           

Flag	Coverage Δ
chain-monitor	40.82% <ø> (ø)

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