rosetta: upgrade to newest version (#9314)

* feat:  update rosetta sdk to v0.6.10 

embed from v1.0.0 release branch of the library: https://github.com/tendermint/cosmos-rosetta-gateway/tree/release/v1.0.0

closes:
https://github.com/cosmos/cosmos-sdk/issues/9300

Co-authored-by: Alessio Treglia <alessio@tendermint.com>

docs/architecture/adr-035-rosetta-api-support.md

@@ -7,6 +7,10 @@
 - Alessio Treglia (@alessio)
 - Frojdy Dymylja (@fdymylja)
 
+
+## Changelog
+
+- 2021-05-12: the external library  [cosmos-rosetta-gateway](https://github.com/tendermint/cosmos-rosetta-gateway) has been moved within the SDK.
 ## Context
 
 [Rosetta API](https://www.rosetta-api.org/) is an open-source specification and set of tools developed by Coinbase to 
@@ -34,7 +38,7 @@ The driving principles of the proposed design are:
 
 We will achieve these delivering on these principles by the following:
 
-1. There will be an external repo called [cosmos-rosetta-gateway](https://github.com/tendermint/cosmos-rosetta-gateway) 
+1. There will be a package `rosetta/lib`
    for the implementation of the core Rosetta API features, particularly:
    a. The types and interfaces (`Client`, `OfflineClient`...), this separates design from implementation detail.
    b. The `Server` functionality as this is independent of the Cosmos SDK version.
@@ -207,4 +211,3 @@ Proposed
 ## References
 
 - https://www.rosetta-api.org/
-- https://github.com/tendermint/cosmos-rosetta-gateway

docs/run-node/rosetta.md

@@ -2,8 +2,6 @@
 
 Package rosetta implements the rosetta API for the current cosmos sdk release series.
 
-The client satisfies [cosmos-rosetta-gateway](https://github.com/tendermint/cosmos-rosetta-gateway) `Client` interface implementation. 
-
 ## Extension
 
 There are two ways in which you can customize and extend the implementation with your custom settings.
@@ -24,7 +22,7 @@ import (
 
 "context"
 "github.com/coinbase/rosetta-sdk-go/types"
-"github.com/cosmos/cosmos-sdk/server/rosetta"
+"github.com/cosmos/cosmos-sdk/server/rosetta/lib"
 )
 
 // CustomClient embeds the standard cosmos client
@@ -48,7 +46,7 @@ Example:
 
 ```go
 package custom_errors
-import crgerrs "github.com/tendermint/cosmos-rosetta-gateway/errors"
+import crgerrs "github.com/cosmos/cosmos-sdk/server/rosetta/lib/errors"
 
 var customErrRetriable = true
 var CustomError = crgerrs.RegisterError(100, "custom message", customErrRetriable, "description")