feat(rm-children|2/4): remove most code related to pub children #2207

Job	Run time
build-all / Emit container tag sha	4s
ci / ci	2m 38s
build-all / build-base / Build	2m 47s
build-all / build-jobs / Build	1m 42s
build-all / build-core / Build	6m 1s
e2e	0s
	13m 12s

Provide feedback