tests

Support testing with downloaded binaries #710

Job	Run time
Building macOS libraries	1m 11s
Building Android libraries	3m 10s
Building Linux libraries	2m 13s
Building Windows libraries	2m 2s
Build XCFramework	7m 8s
Basic WASM build	1m 52s
Rust unit tests on macos-latest	1m 22s
Rust unit tests on ubuntu-24.04	2m 48s
Testing with Valgrind on ubuntu-latest	1m 6s
Testing on ubuntu-arm64	2m 26s
Testing on macos-latest	1m 49s
Testing on windows-latest	1m 8s
Testing on ubuntu-24.04	2m 18s
	30m 33s

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