test_runner: add extra fields in AssertionError YAML
Many TAP reporters offer special-case handling of YAML objects containing expected, actual, and operator fields, as produced by AssertionError and similar userland Error classes.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Many TAP reporters offer special-case handling of YAML objects containing expected, actual, and operator fields, as produced by AssertionError and similar userland Error classes.