fix[ci/build]: move RDT artifacts to debug_sources

[hoxyq]

Summary

Move RDT bindings model and RDT artifacts to debug_sources.

The general idea is that only entrypoints, and static resources should be listed in release_sources. Basically everything, what is copied to release build or if used as a source for an entrypoint / module.

Manually observing the release build artifacts confirms that all these files are actually inlined into their corresponding entrypoints:

• RDT artifacts into third_party/react_devtools/react_devtools.js
• ReactDevToolsBindingsModel into models/react_native/react_native.js

Test plan

• npm run build produces no errors
• npm run build-release produces no errors

Upstreaming plan

• This commit should be sent as a patch to the upstream devtools-frontend repo. I've reviewed the contribution guide.
• This commit is React Native-specific and cannot be upstreamed.