[Key Vault - Keys] Use Python 3.9 failing in nightly runs

[jerryshia]

Key Vault - Keys nightly test runs are failing with:

Error message: Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping ERROR: Could not find a version that satisfies the requirement pip (from versions: none) ERROR: No matching distribution found for pip

[error]Failed to download Python from the Github Actions python registry (https://github.com/actions/python-versions). Error: Error: The process '/bin/bash' failed with exit code 1

[error]Version spec 3.9 for architecture x64 did not match any version in Agent.ToolsDirectory.

Versions in /Users/runner/hostedtoolcache:

For more details check here: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=4310144&view=results

[github-actions[bot]]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @jlichwa @RandalliLama @schaabs.