tests

Refactor building schema statements #869

Job	Run time
Building macOS libraries	-1s
build_stable_rust	1m 52s
Building Android libraries	-1s
Rust unit tests on ${{ matrix.os }}	-1s
Build XCFramework	-1s
Building Windows libraries	-1s
Basic WASM build	-1s
Building Linux libraries	-1s
Testing on ${{ matrix.os }}	0s
Testing with Valgrind on ${{ matrix.os }}	-8s
	1m 37s

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