* feat: retry generates backoff value after completing on_error callbacks

* added comment

* use single sleep iterator for retries

* fix tests

* update variable name

* adjusted docstring

* 🦉 Updates from OwlBot post-processor

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

* fixed mypy issues

* added comment

* added unit tests for dynamic backoff

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

…talled (#808)

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

* chore(python): remove .gitignore from templates

Source-Link: googleapis/synthtool@419d94c
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:a7aef70df5f13313ddc027409fc8f3151422ec2a57ac8730fce8fa75c060d5bb

* 🦉 Updates from OwlBot post-processor

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

* Remove replacement in owlbot.py

---------

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

* fixed null pointer

* added test

* 🦉 Updates from OwlBot post-processor

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

* removed unneeded file

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

* for testing purposes

* lint

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