refactor!: remove testutil/network

CHANGELOG.md

@@ -61,6 +61,8 @@ Every module contains its own CHANGELOG.md. Please refer to the module you are i
 
 ### API Breaking Changes
 
+* (testutil) [#22392](https://github.com/cosmos/cosmos-sdk/pull/22392) Remove `testutil/network` package. Use the integration framework or systemtests framework instead.
+
 ### Deprecated
 
 ## [v0.52.0](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.52.0) - 2024-XX-XX

server/grpc/server.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net"
 
+	gogogrpcserver "github.com/cosmos/gogoproto/grpc"
 	"google.golang.org/grpc"
 
 	"cosmossdk.io/log"
@@ -14,13 +15,12 @@ import (
 	"github.com/cosmos/cosmos-sdk/server/config"
 	"github.com/cosmos/cosmos-sdk/server/grpc/gogoreflection"
 	reflection "github.com/cosmos/cosmos-sdk/server/grpc/reflection/v2alpha1"
-	"github.com/cosmos/cosmos-sdk/server/types"
 	_ "github.com/cosmos/cosmos-sdk/types/tx/amino" // Import amino.proto file for reflection
 )
 
 // NewGRPCServer returns a correctly configured and initialized gRPC server.
 // Note, the caller is responsible for starting the server. See StartGRPCServer.
-func NewGRPCServer(clientCtx client.Context, app types.Application, cfg config.GRPCConfig) (*grpc.Server, error) {
+func NewGRPCServer(clientCtx client.Context, app interface{ RegisterGRPCServer(gogogrpcserver.Server) }, cfg config.GRPCConfig) (*grpc.Server, error) {
 	maxSendMsgSize := cfg.MaxSendMsgSize
 	if maxSendMsgSize == 0 {
 		maxSendMsgSize = config.DefaultGRPCMaxSendMsgSize