[Thinkit] Create milestones for controlling test behavior in PINs NSF integration tests.Implement OTG traffic helper for the NSF Upgrade test skeleton.

[VSuryaprasad-HCL]

Keyword Check:
~/sonic-buildimage/src/sonic-p4rt/sonic-pins$ ~/tools/keyword_checks.sh .
Keyword check Passed.

Build Result:
/sonic/src/sonic-p4rt/sonic-pins$ bazel build $BAZEL_BUILD_OPTS ...
INFO: Analyzed 684 targets (1 packages loaded, 5 targets configured).
INFO: Found 684 targets...
INFO: From Compiling tests/integration/system/nsf/traffic_helpers/otg_helper.cc:
tests/integration/system/nsf/traffic_helpers/otg_helper.cc: In member function 'virtual absl::lts_20230802::Status pins_test::OtgHelper::ValidateTraffic(int, thinkit::GenericTestbed&)':
tests/integration/system/nsf/traffic_helpers/otg_helper.cc:183:28: warning: comparison of integer expressions of different signedness: 'uint64_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
183 | if (bytes_drop_percent <= error_margin &&
| ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
INFO: Elapsed time: 20.400s, Critical Path: 19.52s
INFO: 6 processes: 3 internal, 3 linux-sandbox.
INFO: Build completed successfully, 6 total actions

Test Result:
/sonic/src/sonic-p4rt/sonic-pins$ bazel test $BAZEL_BUILD_OPTS --cache_test_results=no ...
INFO: Analyzed 684 targets (0 packages loaded, 0 targets configured).
INFO: Found 468 targets and 216 test targets...
INFO: Elapsed time: 255.599s, Critical Path: 116.83s
INFO: 270 processes: 325 linux-sandbox, 18 local.
INFO: Build completed successfully, 270 total actions
//dvaas:port_id_map_test PASSED in 0.8s
//dvaas:test_run_validation_golden_test PASSED in 0.1s
//dvaas:test_run_validation_test PASSED in 0.7s
//dvaas:test_run_validation_test_runner PASSED in 0.1s
//dvaas:test_vector_stats_diff_test PASSED in 0.1s
//dvaas:test_vector_stats_test PASSED in 0.1s
//dvaas:test_vector_test PASSED in 0.6s
//p4rt_app/tests:response_path_test PASSED in 6.5s
//p4rt_app/tests:role_test PASSED in 1.6s
//p4rt_app/tests:state_verification_test PASSED in 3.5s
//p4rt_app/tests:vrf_table_test PASSED in 2.9s
//p4rt_app/tests/lib:app_db_entry_builder_test PASSED in 0.0s
//p4rt_app/utils:event_data_tracker_test PASSED in 0.0s
//p4rt_app/utils:table_utility_test PASSED in 0.7s
//sai_p4/instantiations/google:clos_stage_test PASSED in 0.6s
//sai_p4/instantiations/google:fabric_border_router_p4info_up_to_date_test PASSED in 0.1s
//sai_p4/instantiations/google:middleblock_p4info_up_to_date_test PASSED in 0.0s
//sai_p4/instantiations/google:sai_nonstandard_platforms_build_test PASSED in 0.0s
//sai_p4/instantiations/google:sai_nonstandard_platforms_cc_test PASSED in 0.7s
//sai_p4/instantiations/google:sai_p4info_fetcher_test PASSED in 0.7s
//sai_p4/instantiations/google:sai_p4info_test PASSED in 1.1s
//sai_p4/instantiations/google:sai_pd_proto_test PASSED in 0.0s
//sai_p4/instantiations/google:sai_pd_util_test PASSED in 0.6s
//sai_p4/instantiations/google:tor_p4info_up_to_date_test PASSED in 0.0s
//sai_p4/instantiations/google:union_p4info_up_to_date_test PASSED in 0.1s
//sai_p4/instantiations/google:wbb_p4info_up_to_date_test PASSED in 0.0s
//sai_p4/instantiations/google/test_tools:table_entry_generator_helper_test PASSED in 1.7s
//sai_p4/instantiations/google/test_tools:test_entries_test PASSED in 1.0s
//sai_p4/instantiations/google/tests:p4_fuzzer_integration_test PASSED in 3.6s
//sai_p4/tools:p4info_tools_test PASSED in 0.7s
//sai_p4/tools:packetio_tools_test PASSED in 0.8s
//tests:thinkit_gnmi_interface_util_tests PASSED in 1.2s
//tests/lib:p4info_helper_test PASSED in 0.8s
//tests/lib:p4rt_fixed_table_programming_helper_test PASSED in 0.8s
//tests/lib:packet_generator_test PASSED in 27.1s
//tests/lib:switch_test_setup_helpers_golden_test PASSED in 0.1s
//tests/lib:switch_test_setup_helpers_golden_test_runner PASSED in 0.1s
//tests/qos:gnmi_parsers_test PASSED in 0.1s
//tests/qos:gnmi_parsers_test_runner PASSED in 0.0s
//tests/sflow:sflow_util_test PASSED in 6.9s
//thinkit:bazel_test_environment_test PASSED in 0.6s
//thinkit:generic_testbed_test PASSED in 1.0s
//thinkit:mock_control_device_test PASSED in 0.6s
//thinkit:mock_generic_testbed_test PASSED in 0.9s
//thinkit:mock_mirror_testbed_test PASSED in 0.8s
//thinkit:mock_ssh_client_test PASSED in 0.0s
//thinkit:mock_switch_test PASSED in 0.8s
//thinkit:mock_test_environment_test PASSED in 0.1s
//thinkit:switch_test PASSED in 0.7s
//sai_p4/instantiations/google/tests:p4_constraints_integration_test PASSED in 1.0s
Stats over 5 runs: max = 1.0s, min = 0.7s, avg = 0.8s, dev = 0.1s
//sai_p4/instantiations/google/test_tools:table_entry_generator_test PASSED in 51.0s
Stats over 50 runs: max = 51.0s, min = 0.8s, avg = 7.6s, dev = 15.3s

Executed 216 out of 216 tests: 216 tests pass.
INFO: Build completed successfully, 270 total actions

[mssonicbld]

/azp run

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[mssonicbld]

/azp run

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[jaanah-hcl]

@kishanps Kindly review the PR
Thanks

[mssonicbld]

/azp run

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[mssonicbld]

/azp run

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