tests: Add serialization test #372

Job	Run time
formatting	11s
linting	1m 49s
mavlink-dump	59s
internal-tests (ardupilotmega)	1m 16s
msrv	5m 37s
internal-tests (asluav)	3m 4s
internal-tests (matrixpilot)	1m 37s
internal-tests (minimal)	1m 20s
internal-tests (paparazzi)	1m 37s
internal-tests (python_array_test)	1m 35s
internal-tests (slugs)	1m 14s
internal-tests (standard)	1m 14s
internal-tests (test)	1m 20s
internal-tests (ualberta)	1m 24s
internal-tests (uavionix)	1m 14s
internal-tests (icarous)	1m 16s
internal-tests (common)	1m 14s
docs	1m 26s
build (macos-latest, x86_64-apple-darwin, --features ardupilotmega)	6m 10s
build (ubuntu-latest, arm-unknown-linux-musleabihf, --features ardupilotmega)	2m 21s
build (ubuntu-latest, armv7-unknown-linux-musleabihf, --features ardupilotmega)	2m 27s
build (ubuntu-latest, x86_64-unknown-linux-musl, --features ardupilotmega)	2m 22s
build (ubuntu-latest, x86_64-unknown-linux-musl, --features ardupilotmega,emit-description,emit-e...	2m 31s
build (ubuntu-latest, thumbv7m-none-eabi, --no-default-features --features embedded)	1m 18s
build (windows-latest, x86_64-pc-windows-msvc, --features ardupilotmega)	3m 11s
test-embedded-size	42s
	50m 29s

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