chore: regenerate samples (#33)

* chore: update gapic-generator-python to 1.4.3 with test fixes

PiperOrigin-RevId: 475399737

Source-Link: googleapis/googleapis@4c4a9a2

Source-Link: googleapis/googleapis-gen@72fdb5a
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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>

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