cli: Fix false-negative result of Inner Ring healthcheck

Previously, IR healthcheck command failed with unimplemented
`neo.fs.v2.netmap.NetmapService`. This was caused by API client
implementation in NeoFS SDK RC-10 which called `EndpointInfo` RPC on
dial: IR nodes doesn't serve NeoFS API, only IR Control API.

As a temp solution, `GetSDKClient` function ignores `Unimplemented` gRPC
errors during client dial.

Signed-off-by: Leonard Lyubich <[email protected]>

cmd/neofs-cli/internal/client/sdk.go

@@ -11,6 +11,8 @@ import (
 	"github.com/nspcc-dev/neofs-sdk-go/client"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 )
 
 var errInvalidEndpoint = errors.New("provided RPC endpoint is incorrect")
@@ -62,6 +64,23 @@ func GetSDKClient(ctx context.Context, cmd *cobra.Command, addr network.Address)
 	}
 
 	if err := c.Dial(prmDial); err != nil { //nolint:contextcheck // SetContext is used above.
+		// Here is a hack helping IR healthcheck to work. Current API client revision
+		// calls NetmapService.EndpointInfo RPC which is a part of the NeoFS API
+		// protocol. Inner ring nodes don't serve NeoFS API services, so they respond
+		// with Unimplemented code. We ignore this error here:
+		//  - if nodes responds, then dial was successful
+		//  - even if we connect to storage node which MUST provide NeoFS API services,
+		//    subsequent EndpointInfo method will return Unimplemented error anyway
+		// This behavior is going to be fixed on SDK side.
+		//
+		// Track https://github.com/nspcc-dev/neofs-node/issues/2477
+		wErr := err
+		for e := errors.Unwrap(wErr); e != nil; e = errors.Unwrap(wErr) {
+			wErr = e
+		}
+		if status.Code(wErr) == codes.Unimplemented {
+			return c, nil
+		}
 		return nil, fmt.Errorf("can't init SDK client: %w", err)
 	}