Test2::Util::Facets2Legacy(3p) on OpenBSD

The text 0a14becc569a, as OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0, OpenBSD 6.9 shipped it.

Convert facet data to the legacy event API.

Test2::Util::Facets2Legacy(3p) on OpenBSD now