* chore: fix get RPO sample

There was an extra line here that doesn't make sense. Fixing based
on external user feedback.

* Update samples/snippets/storage_get_rpo.py

Co-authored-by: cojenco <[email protected]>

* remove constant import

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Co-authored-by: cojenco <[email protected]>

Co-authored-by: cojenco <[email protected]>

* build(python): fix `docs` and `docfx` builds

Source-Link: googleapis/synthtool@fac8444
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:5ea6d0ab82c956b50962f91d94e206d3921537ae5fe1549ec5326381d8905cfa

* apply googleapis/synthtool#1916

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

* fix: replace utcnow in Bucket

* replace utcnow in signing

* update constant and tests

* update datetime in post policy

* replace utcnow in system tests

* replace tzinfo

…p/templates/python_library/.kokoro (#1217)

Source-Link: googleapis/synthtool@e13b22b
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:97b671488ad548ef783a452a9e1276ac10f144d5ae56d98cc4bf77ba504082b4

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

* samples: replace deprecated method

* update print statement, decode

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>