Build

ci: allow usage of cache from main branch in PR (#131) #640

Job	Run time
build-typescript-apps / build-typescript-apps	1m 40s
build-onyx / build-onyx	30s
build-python-apps / build-python-apps	1m 20s
build-backend / build-backend	5m 46s
build-ui / build-ui	44s
build-ui-docker-image / build-ui-docker-image	2m 8s
build-core-docker-image / build-core-docker-image	1m 31s
build-backend-docker-image / build-backend-docker-image	3m 13s
	16m 52s

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