gh-121489: Export private _PyBytes_Join() again #120836

Job	Run time
Check for source changes	13s
Check if generated files are up to date	4m 53s
Windows MSI${{ '' }}	0s
Address sanitizer	6m 23s
Ubuntu SSL tests with OpenSSL (1.1.1w)	2m 6s
Hypothesis tests on Ubuntu	5m 29s
Ubuntu SSL tests with OpenSSL (3.0.13)	1m 59s
Ubuntu SSL tests with OpenSSL (3.1.5)	2m 17s
Ubuntu SSL tests with OpenSSL (3.2.1)	1m 58s
CIFuzz (address)	6m 10s
CIFuzz (undefined)	6m 12s
CIFuzz (memory)	6m 12s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 11s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 37s
macOS / build and test (macos-13)	6m 26s
Thread sanitizer / Thread sanitizer	4m 20s
Thread sanitizer (free-threading) / Thread sanitizer	6m 24s
WASI / build and test	5m 54s
Windows / build (arm64)	3m 42s
Windows (free-threading) / build (arm64)	3m 42s
Windows / build and test (Win32)	6m 7s
Windows (free-threading) / build and test (Win32)	6m 9s
Windows (free-threading) / build and test (x64)	6m 10s
Windows / build and test (x64)	6m 9s
Ubuntu / build and test	6m 23s
Ubuntu (free-threading) / build and test	6m 24s
Docs / Docs	1m 54s
Docs / Doctest	6m 22s
Docs / Docs (Oldest Sphinx)	1m 53s
All required checks pass	4s
	2h 12m 43s

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