[#1374] cli: Drop deprecated grpc connection method

For `frostfs-cli` it is ok to use grpc-client without blocking,
as `frostfs-cli` will perform RPC call anyway.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

cmd/frostfs-cli/modules/tree/get_op_log.go

@@ -44,9 +44,10 @@ func getOpLog(cmd *cobra.Command, _ []string) {
 	commonCmd.ExitOnErr(cmd, "decode container ID string: %w", err)
 
 	tid, _ := cmd.Flags().GetString(treeIDFlagKey)
-	ctx := cmd.Context()
+	ctx, cancel := contextWithTimeout(cmd)
+	defer cancel()
 
-	cli, err := _client(ctx)
+	cli, err := _client()
 	commonCmd.ExitOnErr(cmd, "failed to create client: %w", err)
 
 	rawCID := make([]byte, sha256.Size)