Refactor test runner #687

Job	Run time
Build Rust tests (macos-latest)	1m 29s
Build Assemblyscript tests (windows-11-arm)	31s
Build Assemblyscript tests (ubuntu-latest)	35s
Build Assemblyscript tests (macos-latest)	25s
Build Rust tests (windows-11-arm)	1m 13s
Build Assemblyscript tests (windows-latest)	24s
Build C tests (ubuntu-latest)	10s
Build Rust tests (windows-latest)	59s
Build C tests (windows-11-arm)	53s
Build C tests (macos-latest)	10s
Build Rust tests (ubuntu-latest)	57s
Build C tests (windows-latest)	36s
Run tests (windows-latest, wasmtime)	1m 6s
Run tests (macos-latest, wasmtime)	34s
Run tests (ubuntu-latest, wasmtime)	25s
Run tests (windows-11-arm, wasmtime)	58s
upload_test_binaries	0s
	11m 25s

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