VOL-936 Update protos to latest and mark GetExtValue as NotImplemented

Change-Id: Ic80e8f3cbffa022d0abfe3a0845ebe6b3adfa83f
diff --git a/vendor/modules.txt b/vendor/modules.txt
index b11313d..b81647f 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -114,7 +114,7 @@
 github.com/opencord/voltha-lib-go/v3/pkg/mocks/kafka
 github.com/opencord/voltha-lib-go/v3/pkg/probe
 github.com/opencord/voltha-lib-go/v3/pkg/version
-# github.com/opencord/voltha-protos/v3 v3.3.2
+# github.com/opencord/voltha-protos/v3 v3.3.3
 github.com/opencord/voltha-protos/v3/go/common
 github.com/opencord/voltha-protos/v3/go/inter_container
 github.com/opencord/voltha-protos/v3/go/omci