tests

[WIP] test restructure for improving sync_local performance #946

Job	Run time
build_stable_rust	1m 18s
Building Android libraries	0s
Building macOS libraries	0s
Building Linux libraries	0s
Building Windows libraries	-1s
Basic WASM build	-1s
Testing with Valgrind on ${{ matrix.os }}	-1s
Rust unit tests on ${{ matrix.os }}	-1s
Build XCFramework	-1s
Testing on ${{ matrix.os }}	-1s
	1m 12s

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