chore: regenerate samples (#275)

PiperOrigin-RevId: 475580307

Source-Link: googleapis/googleapis@dbc83bd

Source-Link: googleapis/googleapis-gen@26c1205
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* 🦉 Updates from OwlBot post-processor

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

* 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
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* 🦉 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>

Author: gcf-owl-bot[bot]