feat(contracts): bench test for ScrollChain

[zimpha]

Purpose or design rationale of this PR

Describe your change. Make sure to answer these three questions: What does this PR do? Why does it do it? How does it do it?

This PR add benchmark tests for ScrollChain to compute the gas usage for different inputs.

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:

• test: Adding missing tests or correcting existing tests

Deployment tag versioning

Has tag in common/version.go been updated?

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

Breaking change label

Does this PR have the breaking-change label?

• No, this PR is not a breaking change
• Yes

[github-actions]

LCOV of commit 46dadab during Contracts #1349

Summary coverage rate:
  lines......: 52.6% (992 of 1885 lines)
  functions..: 67.3% (222 of 330 functions)
  branches...: no data found

Files changed coverage rate: n/a

[codecov]

Codecov Report

Merging #721 (dffa744) into develop (44b9241) will decrease coverage by 0.17%.
The diff coverage is n/a.

❗ Current head dffa744 differs from pull request most recent head 46dadab. Consider uploading reports for the commit 46dadab to get more accurate results

@@             Coverage Diff             @@
##           develop     #721      +/-   ##
===========================================
- Coverage    43.90%   43.74%   -0.17%     
===========================================
  Files           72       72              
  Lines         7019     6988      -31     
===========================================
- Hits          3082     3057      -25     
+ Misses        3685     3680       -5     
+ Partials       252      251       -1     

Flag	Coverage Δ
bridge	62.14% <ø> (-0.19%)	⬇️
common	54.85% <ø> (ø)
coordinator	19.46% <ø> (ø)
database	42.85% <ø> (ø)

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see 3 files with indirect coverage changes