MVP subsystems as self standing separable charts

As an integrator of various sub-entities (e.g TMC subarrays, csp lmc, cbf, sdp tango devices, etc); I  want to deploy/install and delete/uninstall those entities as sub-charts in a piecewise manner without affecting the state of the system (other than gracefully degrading its available functionalities) in order to separate issues, recover quickly from failures (by restarting only a subset) and test/diagnose issues occurring on a system level.

Therefore as a capability, all deployable applications (helm charts) must as a minimum be able to deploy with the following characteristics:

1. deploy standalone with any missing runtime dependencies placing the deployment in an appropriate waiting state until missing parts are deployed
2. run a self-test on itself to verify deployment and expected features and functionalities are working
3. deploy with simulators/mocks to test functionalities on the deployment that can only be achieved with the presence of other runtime deployments

Note the presence/absence of shared dependencies (for example the tango base or etcd cluster) is a special case that may need to be deployed always in order to effectively have self-standing deployable charts.