gh-109218: Refactor tests for the complex() constructor #114397

Job	Run time
Check for source changes	10s
Check if generated files are up to date	5m 1s
Docs	0s
Address sanitizer	10m 28s
Ubuntu SSL tests with OpenSSL (1.1.1w)	1m 59s
Hypothesis tests on Ubuntu	6m 13s
Ubuntu SSL tests with OpenSSL (3.0.13)	2m 5s
Ubuntu SSL tests with OpenSSL (3.1.5)	2m 17s
Ubuntu SSL tests with OpenSSL (3.2.1)	1m 57s
CIFuzz	0s
Windows (free-threading) / build (arm64)	2m 53s
Windows (free-threading) / build and test (x64)	20m 29s
Windows (free-threading) / build and test (x86)	21m 44s
macOS / build and test (macos-14)	8m 34s
macOS (free-threading) / build and test (macos-14)	19m 52s
macOS / build and test (macos-13)	12m 49s
Windows / build and test (x64)	19m 30s
Windows / build (arm64)	2m 34s
Windows / build and test (x86)	17m 7s
Thread sanitizer / Thread sanitizer	4m 25s
Ubuntu / build and test	8m 10s
Ubuntu (free-threading) / build and test	9m 29s
WASI / build and test	10m 16s
Thread sanitizer (free-threading) / Thread sanitizer	7m 36s
All required checks pass	7s
	3h 15m 45s

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