* chore(python): drop python 3.6

Source-Link: googleapis/synthtool@4f89b13
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:e7bb19d47c13839fe8c147e50e02e8b6cf5da8edd1af8b82208cd6f66cc2829c

* add api_description to .repo-metadata.json

* 🦉 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>
Co-authored-by: Anthonios Partheniou <[email protected]>

Co-authored-by: Anthonios Partheniou <[email protected]>

* refactor: dual-region API update

* test coverage

…827)

Source-Link: googleapis/synthtool@95d9289
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:c8878270182edaab99f2927969d4f700c3af265accd472c3425deedff2b7fd93

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

Co-authored-by: Leah E. Cole <[email protected]>
Co-authored-by: Anthonios Partheniou <[email protected]>

File-like objects should be opened in binary mode for `blob.upload_from_file()`
- cpython standard library accorded with [RFC 2616 Section 3.7.1](https://datatracker.ietf.org/doc/html/rfc2616#section-3.7.1) states the text default charset of iso-8859-1
- add clarifying notes in docstring
- update code sample

Fixes #818 🦕

Co-authored-by: Anthonios Partheniou <[email protected]>

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