Implement `reconcile` pattern #70

Job	Run time
build-all-charms (./charms/k8s/) / Build and push charms	2m 14s
build-all-charms (./charms/k8s-worker/) / Build and push charms	2m 12s
integration-tests / Get runner image / Get runner image	4s
integration-tests / Build and push charm	22s
integration-tests / Build rock / Get rocks	4s
integration-tests / Build image / Get images	2s
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 43s
integration-tests / Required Integration Test Status Checks	1s
	17m 43s

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