*: drop old sdk dependecies, bump neofs-api-go version

I'm not sure it works, but it's enough code-wise for now. We're reusing some
http-gw components here that are to be moved into sdk-go in future.

Signed-off-by: Roman Khimov <roman@nspcc.ru>

api/user-auth.go

@@ -1,14 +1,16 @@
 package api
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gorilla/mux"
-	sdk "github.com/nspcc-dev/cdn-sdk"
 	"github.com/nspcc-dev/neofs-s3-gw/api/auth"
 	"go.uber.org/zap"
 )
 
+const BearerTokenKey = "__context_bearer_token_key"
+
 // AttachUserAuth adds user authentication via center to router using log for logging.
 func AttachUserAuth(router *mux.Router, center auth.Center, log *zap.Logger) {
 	router.Use(func(h http.Handler) http.Handler {
@@ -21,7 +23,7 @@ func AttachUserAuth(router *mux.Router, center auth.Center, log *zap.Logger) {
 			}
 
 			h.ServeHTTP(w, r.WithContext(
-				sdk.SetBearerToken(r.Context(), token)))
+				context.WithValue(r.Context(), BearerTokenKey, token)))
 		})
 	})
 }