.Net: Bug: Converting Kernel Plugins to AIFunctions fails name validation

[cdock1029]

Describe the bug
Extracting an IChatClient from a Kernel with Plugins, transforming the Plugins to Tools / AIFunctions, then using the IChatClient fails

To Reproduce

 serviceCollection
     .AddKernel()
     .AddOpenAIChatCompletion(apiKey: chatConfig!.OpenAiApiKey!, modelId: "gpt-4o-mini")
     .Plugins
     .AddFromType<UtilitiesPlugin>()
     .AddFromType<TreasuryPlugin>();

 serviceCollection.AddChatClient(serviceProvider =>
 {
     Kernel kernel = serviceProvider.GetRequiredService<Kernel>();
     IChatCompletionService completionService = kernel.GetRequiredService<IChatCompletionService>();
     IChatClient client = completionService.AsChatClient();
     ChatClientBuilder builder = new ChatClientBuilder(client)
         .UseFunctionInvocation()
         .ConfigureOptions(options =>
         {
             IEnumerable<AIFunction> aiFunctions =
                 kernel.Plugins.SelectMany(kp => kp.AsAIFunctions());
             options.Tools = [..aiFunctions];
             options.ToolMode = ChatToolMode.Auto;
         });
     return builder.Build();
 });

public sealed class UtilitiesPlugin
{
    [KernelFunction("get_current_utc_time")]
    public string GetCurrentUtcTime()
    {
        return DateTime.UtcNow.ToString("R");
    }
}

//elsewhere
 var result = await Client.GetResponseAsync("Who are you?");

Error:

System.ArgumentException: A function name can contain only ASCII letters, digits, and underscores: 'UtilitiesPlugin-get_current_utc_time' is not a valid name. (Parameter 'value')
   at Microsoft.SemanticKernel.Verify.ThrowArgumentInvalidName(String kind, String name, String paramName)
   at Microsoft.SemanticKernel.Verify.ValidFunctionName(String functionName, String paramName)
   at Microsoft.SemanticKernel.KernelFunctionMetadata.set_Name(String value)

Expected behavior
Successfully sends messages, whether calling functions or not.

Platform

• Language: C#
• Source: Microsoft.SemanticKernel.Abstractions Versions 1.40.1 and 1.31.0
• AI model: OpenAI and AzureAIInference
• IDE: Visual Studio
• OS: Windows

Additional context

In AsAIFunction KernelAIFunction , function names were changed from having an underscore to dash in this commit

ca5e285#diff-38953b1c66d724196bc0bea9aef0d9d3ddd15ad62457ff9cb906b6616a98318fL566

which conflicts with ValidFunctionName which disallows dashes.

Discussion #10815