gh-125522: Remove bare except in test_zlib.test_flushes #131364

Job	Run time
Change detection / Compute changed files	10s
Check if Autoconf files are up to date	25s
Check if generated files are up to date	3m 41s
Windows MSI${{ '' }}	0s
Address sanitizer (ubuntu-22.04)	4m 18s
Docs	0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.0.15)	2m 30s
Hypothesis tests on Ubuntu	4m 16s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.1.7)	2m 39s
CIFuzz	0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.2.3)	2m 36s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.3.2)	2m 20s
Thread sanitizer / Thread sanitizer	4m 12s
Thread sanitizer (free-threading) / Thread sanitizer	4m 17s
WASI / build and test	4m 9s
Windows / build (arm64)	3m 9s
Windows (free-threading) / build (arm64)	3m 20s
Windows / build and test (Win32)	4m 1s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	4m 9s
Windows (free-threading) / build and test (Win32)	3m 58s
Windows / build and test (x64)	4m 4s
Windows (free-threading) / build and test (x64)	4m 8s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	4m 6s
macOS / build and test (macos-13)	4m 16s
Ubuntu / build and test (ubuntu-22.04)	4m 18s
Ubuntu (free-threading) / build and test (ubuntu-22.04)	4m 16s
All required checks pass	2s
	1h 19m 20s

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