gh-118658: Modify cert generation script to extract cert3.pem #127895

Job	Run time
Change detection / Compute changed files	10s
Check if generated files are up to date	4m 49s
Windows MSI${{ '' }}	0s
Docs	0s
Address sanitizer	7m 22s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.0.15)	1m 59s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.1.7)	2m 12s
Hypothesis tests on Ubuntu	5m 42s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.2.3)	2m 16s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.3.2)	2m 22s
CIFuzz	0s
Thread sanitizer / Thread sanitizer	4m 36s
Thread sanitizer (free-threading) / Thread sanitizer	7m 27s
WASI / build and test	5m 55s
Windows / build (arm64)	3m 6s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	8m 42s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	4m 27s
macOS / build and test (macos-13)	10m 7s
Ubuntu / build and test (ubuntu-22.04)	7m 8s
Ubuntu (free-threading) / build and test (ubuntu-22.04)	9m 19s
Windows (free-threading) / build (arm64)	2m 48s
Windows / build and test (Win32)	16m 55s
Windows (free-threading) / build and test (Win32)	23m 44s
Windows (free-threading) / build and test (x64)	21m 36s
Windows / build and test (x64)	14m 41s
All required checks pass	2s
	2h 47m 25s

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