ci: codebuild cleanup script for stale resources

[awsluja]

Description of changes

Cleanup script for Codebuild which focuses on stale resources, by @goldbez . In short, this just runs the cleanup script without any parameters, so that it scans through each e2e test account and deletes old resources. Successful run here https://tiny.amazon.com/kyjz1b29/IsenLink

Issue #, if available

Description of how you validated changes

Checklist

• [ ] PR description included
• [ ] yarn test passes
• [ ] Tests are changed or added
• [ ] Relevant documentation is changed or added (and PR referenced)
• [ ] New AWS SDK calls or CloudFormation actions have been added to relevant test and service IAM policies
• [ ] Pull request labels are added

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