Standalone Dashboard doesn't support disabling certificate validation in the resource service client

I built a custom resource server and I was using HTTP/2 over TLS but wanted to disable certificate validation. Seems like there's no config to do so.

```
Call failed with gRPC error status. Status code: 'Internal', Message: 'Error starting gRPC call. HttpRequestException: The SSL connection could not be established, see inner exception. AuthenticationException: The remote certificate is invalid according to the validation procedure: RemoteCertificateNameMismatch, RemoteCertificateChainErrors'.
2024-04-12T17:02:51.6185866 System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
2024-04-12T17:02:51.6185886 ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure: RemoteCertificateNameMismatch, RemoteCertificateChainErrors
```