Implement `reconcile` pattern #65

Job	Run time
build-all-charms (./charms/k8s/) / Build and push charms	2m 20s
build-all-charms (./charms/k8s-worker/) / Build and push charms	2m 20s
integration-tests / Get runner image / Get runner image	2s
integration-tests / Build and push charm	24s
integration-tests / Build rock / Get rocks	5s
integration-tests / Build image / Get images	3s
integration-tests / Build image / Build image	0s
integration-tests / Build rock / Build rock	0s
integration-tests / Get rocks or Docker images	1s
integration-tests / Integration tests / Integration tests	12m 9s
integration-tests / Required Integration Test Status Checks	1s
	17m 25s

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