[Flight] Patch Promise cycles and toString on Server Functions (#35345)

Server Functions can be stringified (sometimes implicitly) when passed
as data. This adds an override to hide the source code in that case -
just in case someone puts sensitive information in there.

Note that this still preserves the `name` field but this is also
available on the export but in practice is likely minified anyway.
There's nothing else on these referenes we'd consider unsafe unless you
explicitly expose expandos which are part of the `"use server"` export.

This adds a safety check to ensure you don't encode cyclic Promises.
This isn't a parser bug per se. Promises do have a safety mechanism that
avoids them infinite looping. However, since we use custom Thenables,
what can happen is that every time a native Promise awaits it, another
Promise wrapper is created around the Thenable which foils the
ECMAScript Promise cycle detection which can lead to an infinite loop.

This also ensures that embedded `ReadableStream` and `AsyncIterable`
streams are properly closed if the source stream closes early both on
the Server and Client. This doesn't cause an infinite loop but just to
make sure resource clean up can proceed properly.

We're also adding some more explicit clear errors for invalid payloads
since we no longer need to obfuscate the original issue.

scripts/error-codes/codes.json

@@ -551,5 +551,9 @@
   "563": "This render completed successfully. All cacheSignals are now aborted to allow clean up of any unused resources.",
   "564": "Unknown command. The debugChannel was not wired up properly.",
   "565": "resolveDebugMessage/closeDebugChannel should not be called for a Request that wasn't kept alive. This is a bug in React.",
-  "566": "FragmentInstance.scrollIntoView() does not support scrollIntoViewOptions. Use the alignToTop boolean instead."
+  "566": "FragmentInstance.scrollIntoView() does not support scrollIntoViewOptions. Use the alignToTop boolean instead.",
+  "567": "Already initialized stream.",
+  "568": "Already initialized typed array.",
+  "569": "Cannot have cyclic thenables.",
+  "570": "Invalid reference."
 }