Missing source distribution for latest releases of multiple packages

[mgorny]

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Summary of the issue

Context
https://pypi.org/project/google-auth/2.57.0/#files

Expected Behavior:
.tar.gz source distribution present.

Actual Behavior:
Missing file.

API client name and version

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Reproduction steps: code

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Reproduction steps: supporting files

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Reproduction steps: actual results

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Reproduction steps: expected results

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OS & version + platform

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[mgorny]

google-auth-oauthlib-1.4.1, google-auth-httplib2-0.4.2 and google-api-core-2.35.0 are also affected.