Add experimental build to CI #1199

Job	Run time
adapt_release	2s
linting / C	5s
linting / Rust	3m 35s
unit-tests / C	1m 5s
unit-tests / Rust	3m 47s
init / init	5s
build / Rust	17m 36s
build / C	2m 32s
functional / tests	4m 47s
container / debian:oldstable	6m 35s
container / debian:testing	15m 9s
container / ghcr:debian:stable	2m 18s
container / debian:stable	11m 35s
container / greenbone-reg:debian:stable / build-arm64	0s
container / greenbone-reg:debian:stable / build-amd64	3m 48s
container / greenbone-reg:debian:stable / create-multi-arch-manifest	0s
container / greenbone-reg:debian:stable / Test pulling the image on arm64	0s
container / greenbone-reg:debian:stable / Test pulling the image on amd64	0s
container / greenbone-reg:debian:stable / notify	0s
smoketests	0s
release	0s
helm	0s
	1h 12m 59s

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