gh-119180: Add `annotationlib` module to support PEP 649 #120667

Job	Run time
Check for source changes	10s
Check if generated files are up to date	4m 43s
Address sanitizer	9m 26s
Ubuntu SSL tests with OpenSSL (1.1.1w)	2m 15s
CIFuzz (address)	19m 52s
Ubuntu SSL tests with OpenSSL (3.0.13)	2m 2s
Hypothesis tests on Ubuntu	5m 29s
CIFuzz (undefined)	20m 47s
Ubuntu SSL tests with OpenSSL (3.1.5)	2m 8s
CIFuzz (memory)	21m 38s
Ubuntu SSL tests with OpenSSL (3.2.1)	2m 13s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	4m 28s
macOS / build and test (macos-13)	8m 25s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 22s
Thread sanitizer / Thread sanitizer	5m 3s
Thread sanitizer (free-threading) / Thread sanitizer	7m 4s
WASI / build and test	6m 13s
Windows / build (arm64)	3m 32s
Windows (free-threading) / build (arm64)	2m 22s
Windows / build and test (Win32)	16m 6s
Windows (free-threading) / build and test (Win32)	24m 12s
Windows / build and test (x64)	15m 28s
Windows (free-threading) / build and test (x64)	29m 3s
Ubuntu / build and test	7m 21s
Ubuntu (free-threading) / build and test	8m 40s
Docs / Docs	2m 0s
Docs / Docs (Oldest Sphinx)	1m 58s
Docs / Doctest	15m 20s
All required checks pass	3s
	4h 13m 23s

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