Add Nix support to language tests (#10) #67

Job	Run time
test-wasm	1m 19s
rustfmt	13s
lint-build	2m 3s
test (stable, x86_64-unknown-linux-gnu)	4m 39s
test-flake (x86_64-unknown-linux-gnu)	10m 42s
test (stable, x86_64-unknown-linux-musl)	6m 4s
test-flake (x86_64-unknown-linux-musl)	10m 49s
test (stable, aarch64-unknown-linux-gnu)	1m 59s
test-flake (aarch64-unknown-linux-gnu)	10m 48s
test (stable, aarch64-unknown-linux-musl)	3m 59s
test (stable, x86_64-apple-darwin)	5m 32s
test-flake (aarch64-unknown-linux-musl)	10m 52s
test (stable, x86_64-pc-windows-msvc)	5m 43s
test-flake (x86_64-apple-darwin)	10m 10s
test (stable, aarch64-apple-darwin, macos-latest, false, true, true)	4m 26s
test-flake (aarch64-apple-darwin, macos-14)	6m 44s
test-projects	1m 50s
	1h 37m 52s

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