gh-125522: Remove bare except in test_zlib.test_flushes #131355

Job	Run time
Change detection / Compute changed files	9s
Check if Autoconf files are up to date	20s
Check if generated files are up to date	3m 27s
Docs	0s
Address sanitizer (ubuntu-22.04)	9m 1s
Hypothesis tests on Ubuntu	5m 22s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.0.15)	2m 35s
Windows MSI${{ '' }}	0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.1.7)	2m 42s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.2.3)	3m 3s
CIFuzz	0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.3.2)	2m 47s
Thread sanitizer / Thread sanitizer	4m 18s
WASI / build and test	6m 37s
Thread sanitizer (free-threading) / Thread sanitizer	6m 51s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 5s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 14s
macOS / build and test (macos-13)	11m 3s
Windows / build (arm64)	2m 24s
Windows (free-threading) / build (arm64)	3m 14s
Windows / build and test (Win32)	17m 15s
Windows (free-threading) / build and test (Win32)	24m 19s
Windows / build and test (x64)	15m 42s
Windows (free-threading) / build and test (x64)	22m 32s
Ubuntu / build and test (ubuntu-22.04)	7m 17s
Ubuntu (free-threading) / build and test (ubuntu-22.04)	9m 5s
All required checks pass	4s
	2h 50m 26s

Provide feedback