Add v2 version to go module name

Replace all elements from `v2` to root directory.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

rpc/session.go

@@ -0,0 +1,28 @@
+package rpc
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/v2/rpc/client"
+	"github.com/nspcc-dev/neofs-api-go/v2/rpc/common"
+	"github.com/nspcc-dev/neofs-api-go/v2/session"
+)
+
+const serviceSession = serviceNamePrefix + "session.SessionService"
+
+const (
+	rpcSessionCreate = "Create"
+)
+
+func CreateSession(
+	cli *client.Client,
+	req *session.CreateRequest,
+	opts ...client.CallOption,
+) (*session.CreateResponse, error) {
+	resp := new(session.CreateResponse)
+
+	err := client.SendUnary(cli, common.CallMethodInfoUnary(serviceSession, rpcSessionCreate), req, resp, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
+}