chore: regenerate samples (#81)

* chore: update gapic-generator-python-1.4.4 with unit tests generation fixes

PiperOrigin-RevId: 475683078

Source-Link: googleapis/googleapis@df791ce

Source-Link: googleapis/googleapis-gen@ee0ce41
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiZWUwY2U0MWNiOWJmN2JiNTEwMDVlOTkxMDIyYjAwY2UxYmM2NjlkOCJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>