feat(contracts): change MAX_COMMIT_SCALAR and MAX_BLOB_SCALAR to 1e18

[zimpha]

Purpose or design rationale of this PR

This PR change the value of MAX_COMMIT_SCALAR and MAX_BLOB_SCALAR to 1e18, since we are sure they won't have larger values.

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
• Yes

Breaking change label

Does this PR have the breaking-change label?

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

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.30%. Comparing base (ba77a74) to head (e3e9d75).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1354   +/-   ##
========================================
  Coverage    54.30%   54.30%           
========================================
  Files          156      156           
  Lines        11922    11922           
========================================
  Hits          6474     6474           
  Misses        4953     4953           
  Partials       495      495           

Flag	Coverage Δ
contracts	56.70% <ø> (ø)

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