Check if the "TestNetworkServiceEndpointClientRefreshingTime" test is unstable

[dualBreath]

Failure: https://github.com/networkservicemesh/cmd-registry-memory/actions/runs/6796527604/job/18476798951?pr=619

...
Nov  8 09:56:53.400 [INFO] [type:registry] nse-server-unregister={"name":"nse-9"}
Nov  8 09:56:53.400 [WARN] [type:registry] Unegister: failed to load grpc metadata from context: failed to load path from grpc metadata
Nov  8 09:56:53.400 [WARN] [type:registry] can't get spiffe id from empty path
Nov  8 09:56:53.401 [ERRO] [type:registry] policy failed: policies/registry/client_allowed.rego
Nov  8 09:56:53.401 [ERRO] [type:registry] Error returned from sdk/pkg/registry/common/authorize/authorizeNSEServer.Unregister: registry: an error occurred during authorization policy check: rpc error: code = PermissionDenied desc = no sufficient privileges
    main_test.go:338: 
        	Error Trace:	/build/main_test.go:338
        	Error:      	Received unexpected error:
        	            	rpc error: code = PermissionDenied desc = registry: an error occurred during authorization policy check: rpc error: code = PermissionDenied desc = no sufficient privileges
        	Test:       	TestRegistryTestSuite/TestNetworkServiceEndpointClientRefreshingTime
=== RUN   TestRegistryTestSuite/TestNetworkServiceEndpointRegistration
...
--- FAIL: TestRegistryTestSuite (10.59s)
    --- PASS: TestRegistryTestSuite/TestHealthCheck (1.01s)
    --- FAIL: TestRegistryTestSuite/TestNetworkServiceEndpointClientRefreshingTime (1.05s)
    --- PASS: TestRegistryTestSuite/TestNetworkServiceEndpointRegistration (0.01s)
    --- PASS: TestRegistryTestSuite/TestNetworkServiceEndpointRegistrationExpiration (1.01s)
    --- PASS: TestRegistryTestSuite/TestNetworkServiceRegistration (0.02s)

logs_6119.zip