fix: add missing methods to noop-transaction

[lytc]

In the context of an AWS Lambda function wrapped with apm.lambda, if the APM agent hasn’t started yet, it will raise error like TypeError: trans.setFaas is not a function

Checklist

• [x] Implement code
• [ ] Add tests
• [ ] Update TypeScript typings
• [ ] Update documentation
• [ ] Add CHANGELOG.asciidoc entry
• [x] Commit message follows commit guidelines