AE 1236: Add support for parsing labeled booleans in Go

[symhom]

Pull Request checklist

• [x ] Quality: This PR builds and tests run cleanly
  • make test runs without emitting any warnings
  • make lint runs without emitting any errors
• [ x] Tests: This PR includes thorough tests or an explanation of why it does not
• [ x] Changelog: This PR includes a changelog entry to CHANGELOG.md or an explanation of why it does not need one
  • Any breaking changes to language binding APIs are noted explicitly

[akkomar]

Superseded by #835