Frontend: compress most files to .gz #2924

Job	Run time
frontend-tests	2m 16s
python-tests	3m 40s
deploy-docker-images (bootstrap, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	2m 41s
deploy-docker-images (core, blueos, linux/arm/v7,linux/arm64/v8,linux/amd64)	9m 52s
deploy-raspberry-image	0s
	18m 29s

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