Domain object type composition listeners

[jvigliotta]

Is your feature request related to a problem? Please describe.
We have views that store information in a configuration property on the domain object itself. Sometimes this metadata information is linked to the composition of the domain object and it can become out of sync with the actually object composition if the view controls updating the configuration and it's not being viewed at the time the composition is updated.

Describe the solution you'd like
Similar to how we have an initialize function for domain object types:

openmct/src/plugins/displayLayout/DisplayLayoutType.js

Line 30 in b8fa89a

initialize(domainObject) {

We could have something like:

composition: {
    add: (domainObject, addedObject) => {},
    remove: (domainObject, removedObject) => {}
}

Describe alternatives you've considered
Syncing composition and configuration items on load of the view.

Additional context
This PR/issue is an instance of where this problem arrises.