Update Read/WriteStateBytes RPCs to match hashicorp/terraform-plugin-go#531

Author: SarahFrench

docs/plugin-protocol/tfplugin6.proto

@@ -426,7 +426,7 @@ service Provider {
     rpc ConfigureStateStore(ConfigureStateStore.Request) returns (ConfigureStateStore.Response);
 
     // ReadStateBytes streams byte chunks of a given state file from a state store
-    rpc ReadStateBytes(ReadStateBytes.Request) returns (stream ReadStateBytes.ResponseChunk);
+    rpc ReadStateBytes(ReadStateBytes.Request) returns (stream ReadStateBytes.Response);
     // WriteStateBytes streams byte chunks of a given state file into a state store
     rpc WriteStateBytes(stream WriteStateBytes.RequestChunk) returns (WriteStateBytes.Response);
 
@@ -923,7 +923,6 @@ message ValidateListResourceConfig {
     }
 }
 
-
 message ValidateStateStore {
     message Request {
         string type_name = 1;
@@ -949,7 +948,7 @@ message ReadStateBytes {
         string type_name = 1;
         string state_id = 2;
     }
-    message ResponseChunk {
+    message Response {
         bytes bytes = 1;
         int64 total_length = 2;
         StateRange range = 3;
@@ -959,9 +958,11 @@ message ReadStateBytes {
 
 message WriteStateBytes {
     message RequestChunk {
+        // TODO: Can we decouple this outside of the stream?
         string type_name = 1;
-        bytes bytes = 2;
         string state_id = 3;
+
+        bytes bytes = 2;
         int64 total_length = 4;
         StateRange range = 5;
     }