[WASIp2] soft debugger via sockets

[pavelsavara]

• allow mono soft debugger to use WASIp2 sockets, which are almost unix like
  • drop mini-wasi-debugger.c and make few #ifdef in debugger-agent.c
  • make WASI socket_transport_recv to use MSG_DONTWAIT when called from interp loop
• remove debugger_fd pre-opened socket file descriptor
• make sure that libmono-component-debugger-stub-static.a is not linked intree
• changed mono_jit_parse_options to return number of arguments that it consumed

testing

VS Code
https://marketplace.visualstudio.com/items?itemName=ms-vscode.mono-debug

• use <_WasiDebugger>true</_WasiDebugger> in samples or
• pass --debugger-agent=transport=dt_socket,server=y,address=localhost:55555,loglevel=0 to main()
• and --wasi inherit-network --wasi tcp --wasi udp --wasi allow-ip-name-lookup for wasmtime permissions

.vscode\launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Attach",
            "type": "mono",
            "request": "attach",
            "address": "localhost",
            "port": 55555
        }
    ]
}

[dotnet-policy-service]

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