msggen support for cdp previews (#36781)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/36781

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Add support to msggen for types like:

* Runtime.CustomPreview
* Runtime.EntryPreview
* Runtime.ObjectPreview
* Runtime.PropertyPreview

And their related use as properties.

There was quite a gap here. The work involves:

* Upgrade devtools-protocol to 0.0.1107588 even pick up the schema definitions in the first place.
* Next problem: all the preview stuff is experimental. Had to add support to --include-experimental flag for targeting types AND properties.
* Next problem: the protocol schema for previews is cyclical. ObjectPreview refers to PropertyPreview and EntryPreview, which both refer back to ObjectPreview. msggen only allowed for DAGs. Added support for allowing cycles.
* Next problem: Forward declarations are not enough to compensate for the cyclical references, because of the incomplete type definitions. This breaks optional, vector, and simple containment. To address this:
  * In the graph traversal code, where before we would error if the graph had a cycle, we allow for the cycle, but record the cyclical reference from a property on Type B's to Type A.
  * Whenever we emit the definition of Type B, its references to Type A are not naked, they are now wrapped in a unique_ptr.
  * However, because the unique_ptr only has a forward declaration, and not a complete type, we need to specify a custom deleter.
* Next problem: There are lots of cases where these types that now contain unique_ptrs were being copied, which no longer works. So, make all these codegen'd types move-only, and change a few places where were copying root objects, to move them instead.
* Many tests required changes to avoid copy construction/assignment that were occuring. MessageTypes are not copyable construcrtible/assignable now.

Changelog: [Internal]

Reviewed By: jpporto

Differential Revision: D43553742

fbshipit-source-id: 1e4c495aa600feb6f1901e6bc013d517ba8d8a2d