feat(spanner): drop python runtime 3.9 #17070
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This pull request updates the minimum supported Python version to 3.10, removing support for Python 3.9 and earlier. It includes corresponding updates to the documentation, dependency requirements in setup.py, and CI configuration. Additionally, the PR cleans up legacy code paths related to older Python versions, updates OpenTelemetry attribute keys, and removes now-unnecessary code coverage workarounds in the test suite. There are no review comments to address.
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## Description This Pull Request drops support for Python 3.9 in the `google-cloud-spanner` package. This is part of our ongoing effort to modernize the Cloud SDK libraries and remove support for End-of-Life (EOL) Python versions. ## Changes - Removed Python 3.9 from testing configurations and constraints files. - Resolved dependency conflicts arising from dropping support. - Cleaned up obsolete code related to Python 3.9 support.
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Description
This Pull Request drops support for Python 3.9 in the
google-cloud-spannerpackage. This is part of our ongoing effort to modernize the Cloud SDK libraries and remove support for End-of-Life (EOL) Python versions.Changes