Autopilot Manager: create metadata_preprocessor.py #2805

Job	Run time
frontend-tests	1m 55s
python-tests	2m 55s
deploy-docker-images (bootstrap, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	4m 48s
deploy-docker-images (core, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	11m 30s
deploy-raspberry-image	0s
	21m 8s

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