Updates ViewConfig types to delegate isInAParentText context

Now that HostContext determination for Fabric is a DEV-only behavior, we can move the HostContext determination to resolve from the ViewConfig for a given type. Doing this will allow arbitrary types to register themselves as potential parents of raw text string children. This is the first of two diffs for react as we'll:

1. Add the new property to the ViewConfig types
2. Update React Native to include the `supportsRawText` property for `RCTText`, `RCTVirtualText`, `AndroidTextInput`, etc.
3. Switch the behavior of react to read from the ViewConfig rather than a static list of types.

packages/react-native-renderer/src/ReactNativeTypes.js

@@ -85,13 +85,15 @@ export type ViewConfig = $ReadOnly<{
     }>,
     ...
   }>,
+  supportsRawText?: boolean,
   uiViewClassName: string,
   validAttributes: AttributeConfiguration,
 }>;
 
 export type PartialViewConfig = $ReadOnly<{
   bubblingEventTypes?: $PropertyType<ViewConfig, 'bubblingEventTypes'>,
   directEventTypes?: $PropertyType<ViewConfig, 'directEventTypes'>,
+  supportsRawText?: boolean,
   uiViewClassName: string,
   validAttributes?: PartialAttributeConfiguration,
 }>;