Test

Add missing schema for test-sources #4684

Job	Run time
Linters (mypy, flake8, etc.)	50s
Get qemu emulated architectures	12s
Test on ubuntu-latest (3.13)	45m 27s
Test cibuildwheel building Pyodide wheels	5m 46s
Test on ubuntu-24.04-arm (3.13)	16m 58s
Test on windows-latest (3.13)	53m 43s
Test on macos-13 (3.13)	26m 3s
Test on macos-14 (3.13)	17m 46s
Test on ubuntu-latest (3.11)	46m 43s
Test Linux aarch64 using qemu	30m 16s
Test Linux armv7l using qemu	17m 14s
Test Linux ppc64le using qemu	19m 43s
Test Linux s390x using qemu	21m 17s
	5h 1m 58s

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