CI: Enable more cross-compiled builds #446

Job	Run time
Get declared MSRV from Cargo.toml	10s
Check code formatting (1.74.0)	11s
Check code formatting (stable)	18s
Check code formatting (nightly)	13s
Test on each target (android-aarch64, 1.74.0)	4m 42s
Test on each target (android-aarch64, stable)	4m 38s
Test on each target (android-aarch64, nightly)	4m 49s
Test on each target (linux-aarch64-gnu, 1.74.0)	4m 32s
Test on each target (linux-aarch64-gnu, stable)	4m 33s
Test on each target (linux-aarch64-gnu, nightly)	4m 37s
Test on each target (linux-aarch64-musl, 1.74.0)	4m 42s
Test on each target (linux-aarch64-musl, stable)	4m 31s
Test on each target (linux-aarch64-musl, nightly)	4m 31s
Test on each target (linux-x64-gnu, 1.74.0)	2m 26s
Test on each target (linux-x64-gnu, stable)	2m 23s
Test on each target (linux-x64-gnu, nightly)	2m 18s
Test on each target (linux-x64-musl, 1.74.0)	2m 28s
Test on each target (linux-x64-musl, stable)	2m 20s
Test on each target (linux-x64-musl, nightly)	2m 22s
Test on each target (macos-aarch64, 1.74.0)	2m 13s
Test on each target (macos-aarch64, stable)	2m 11s
Test on each target (macos-aarch64, nightly)	2m 20s
Test on each target (macos-x64, 1.74.0)	2m 17s
Test on each target (macos-x64, stable)	2m 15s
Test on each target (macos-x64, nightly)	2m 14s
Test on each target (windows-x64-msvc, 1.74.0)	4m 49s
Test on each target (windows-x64-msvc, stable)	5m 21s
Test on each target (windows-x64-msvc, nightly)	5m 13s
	1h 25m 37s

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