ci: Revert CI runners from Cirrus Labs back to GitHub-hosted #8721

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	3s
detect-changes	0s
diff_check	0s
Build web	-1s
Build ios ${{ matrix.build-type }} ${{ matrix.ios-use-frameworks }}	-1s
Build android ${{ matrix.build-type }}	-1s
	0s

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