chore: map maintenance err exit code

[j-luong]

Pull Request Submission Checklist

• Follows CONTRIBUTING guidelines
• Commit messages
  are release-note ready, emphasizing
  what was changed, not how.
• Includes detailed description of changes
• Contains risk assessment (Low | Medium | High)
• Highlights breaking API changes (if applicable)
• Links to automated tests covering new functionality
• Includes manual testing instructions (if necessary)
• Updates relevant GitBook documentation (PR link: ___)
• Includes product update to be announced in the next stable release notes

What does this PR do?

Adds exit code mapping for the MaintenanceError Error Catalog error.

Where should the reviewer start?

How should this be manually tested?

What's the product update that needs to be communicated to CLI users?

[github-actions]

	Warnings
⚠️	Since the CLI is unifying on a standard and improved tooling, we're starting to migrate old-style imports and exports to ES6 ones. A file you've modified is using either module.exports or require(). If you can, please update them to ES6 import syntax and export syntax. Files found: test/jest/acceptance/exitcode.spec.ts
⚠️	There are multiple commits on your branch, please squash them locally before merging!

Generated by 🚫 dangerJS against d36963b

[j-luong]

#6418 replacing this PR