Add CLI option for disableTLSCertificateValidation property

[gangefors]

NuGet Product(s) Involved

NuGet.exe, dotnet.exe

The Elevator Pitch

Some time ago the property disableTLSCertificateValidation was added to nuget config sources (#12996, #13023, #13478). But this property is not represented by any CLI option so it needs to be added manually in the NuGet config file.

Similar to how allowInsecureConnections has a CLI option, I would suggest adding a CLI option to set the disableTLSCertificateValidation when using nuget sources add and dotnet nuget add source.

Additional Context and Details

No response