Allow either typed or untyped coroutine state

dispatch/sdk/v1/poll.proto

@@ -12,7 +12,10 @@ import "google/protobuf/duration.proto";
 message Poll {
   // Snapshot of the coroutine state that will be used in the next run to
   // resume the function.
-  bytes coroutine_state = 1 [deprecated = true];
+  oneof state {
+    bytes coroutine_state = 1;
+    google.protobuf.Any typed_coroutine_state = 6;
+  }
 
   // Calls to make asynchronously.
   repeated Call calls = 2;
@@ -42,14 +45,16 @@ message Poll {
   ];
 
   // State of the function. The same state is sent back on the PollResult.
-  google.protobuf.Any state = 6;
 }
 
 // PollResult is the response to a Poll directive.
 message PollResult {
   // The coroutine state that was recorded by the coroutine when it was last
   // paused.
-  bytes coroutine_state = 1 [deprecated = true];
+  oneof state {
+    bytes coroutine_state = 1;
+    google.protobuf.Any typed_coroutine_state = 4;
+  }
 
   // The list of results from calls that were made by the coroutine and
   // completed during the poll.
@@ -59,7 +64,4 @@ message PollResult {
   // that none of the calls were dispatched, and must be resubmitted
   // after the error cause has been resolved.
   Error error = 3;
-
-  // State of the function when polling.
-  google.protobuf.Any state = 4;
 }