FB-specific builds of Flight Server, Flight Client, and React Shared Subset (#27579)

This PR adds a new FB-specific configuration of Flight. We also need to
bundle a version of ReactSharedSubset that will be used for running
Flight on the server.

This initial implementation does not support server actions yet.

The FB-Flight still uses the text protocol on the server (the flag
`enableBinaryFlight` is set to false). It looks like we need some
changes in Hermes to properly support this binary format.

scripts/shared/inlinedHostConfigs.js

@@ -396,13 +396,34 @@ module.exports = [
       'react-dom',
       'react-dom/src/ReactDOMSharedSubset.js',
       'react-dom-bindings',
-      'react-server-dom-fb',
+      'react-server-dom-fb/src/ReactDOMServerFB.js',
       'shared/ReactDOMSharedInternals',
     ],
     isFlowTyped: true,
     isServerSupported: true,
     isFlightSupported: false,
   },
+  {
+    shortName: 'dom-fb-experimental',
+    entryPoints: [
+      'react-server-dom-fb/src/ReactFlightDOMClientFB.js',
+      'react-server-dom-fb/src/ReactFlightDOMServerFB.js',
+    ],
+    paths: [
+      'react-dom',
+      'react-dom-bindings',
+      'react-server-dom-fb/src/ReactFlightClientConfigFBBundler.js',
+      'react-server-dom-fb/src/ReactFlightClientConfigFBBundler.js',
+      'react-server-dom-fb/src/ReactFlightReferencesFB.js',
+      'react-server-dom-fb/src/ReactFlightServerConfigFBBundler.js',
+      'react-server-dom-fb/src/ReactFlightDOMClientFB.js',
+      'react-server-dom-fb/src/ReactFlightDOMServerFB.js',
+      'shared/ReactDOMSharedInternals',
+    ],
+    isFlowTyped: true,
+    isServerSupported: true,
+    isFlightSupported: true,
+  },
   {
     shortName: 'native',
     entryPoints: ['react-native-renderer'],