Address `grpc-server-insecure-connection` Semgrep error

[matthieugouel]

Currently Semgrep CI fails because of the following error:

┌─────────────────────────┐
│ 1 Blocking Code Finding │
└─────────────────────────┘
                          
    pkg/octopus/octopus.go
   ❯❯❱ go.grpc.security.grpc-server-insecure-connection.grpc-server-insecure-connection
          Found an insecure gRPC server without 'grpc.Creds()' or options with credentials. This allows for a
          connection without encryption to this server. A malicious attacker could tamper with the gRPC      
          message, which could compromise the machine. Include credentials derived from an SSL certificate in
          order to create a secure gRPC connection. You can create credentials using                         
          'credentials.NewServerTLSFromFile("cert.pem", "cert.key")'.                                        
          Details: https://sg.run/PwW                                                                        
                                                                                                             
          134┆ s := grpc.NewServer()
    
    
          Taint comes from:
    
          134┆ s := grpc.NewServer()
    
    
                This is how taint reaches the sink:
    
          134┆ s := grpc.NewServer()

We should address this error either by fixing it or ignore it with // nosemgrep: grpc-server-insecure-connection