GNMI-1.11: Removing subinterface_packet_counters_missing deviation fo…

…r Nokia (openconfig#2593)

* GNMI-1.11: Removing subinterface_packet_counters_missing deviation for Nokia

"This code is a Contribution to the OpenConfig Feature Profiles project ("Work") made under the Google Software Grant and Corporate Contributor License Agreement ("CLA") and governed by the Apache License 2.0. No other rights or licenses in or to any of Nokia's intellectual property are granted for any other purpose. This code is provided on an "as is" basis without any warranties of any kind."

* Fixing intermittent timing issue using gnmi.watch observed after removing deviation

* Fixing staticcheck

* Reverting timing changes to script

feature/gnmi/otg_tests/telemetry_interface_packet_counters_test/metadata.textproto

@@ -30,7 +30,6 @@ platform_exceptions: {
   deviations: {
     explicit_port_speed: true
     explicit_interface_in_default_vrf: true
-    subinterface_packet_counters_missing: true
   }
 }
 platform_exceptions: {