Test skip unity external #11320

Job	Run time
Smoketests (spacetimedb-runner)	11m 7s
Check that packages are publishable	14s
Smoketests (windows-latest)	22m 23s
Lints	3m 14s
Test Suite	15m 33s
Build and test wasm bindings	7m 2s
Test spacetimedb-update flow (aarch64-apple-darwin, macos-latest)	1m 16s
Test spacetimedb-update flow (aarch64-unknown-linux-gnu, arm-runner)	36s
Test spacetimedb-update flow (x86_64-pc-windows-msvc, windows-latest)	3m 12s
Test spacetimedb-update flow (x86_64-unknown-linux-gnu, spacetimedb-runner)	58s
	1h 5m 35s

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