Inputs dialog shows dismiss button even when ShowDismiss = false

[eerhardt]

• I have searched the existing issues

Describe the bug
When calling PromptInputsAsync with ShowDismiss = false in InputsDialogInteractionOptions, the dialog still displays a dismiss button. This seems to ignore the ShowDismiss parameter.

Expected Behavior
When the PromptInputsAsync dialog is shown with ShowDismiss = false, the dialog should NOT display a dismiss button.

Steps To Reproduce
Use the following code to create a hosted service with an interaction prompt:

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#pragma warning disable ASPIREINTERACTION001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var builder = DistributedApplication.CreateBuilder(args);

builder.Services.AddHostedService<WebStoryHostedService>();

builder.Build().Run();

internal sealed class WebStoryHostedService(IInteractionService interactionService) : BackgroundService
{
    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        var result = await interactionService.PromptMessageBarAsync(
            "A title",
            "a message",
            new MessageBarInteractionOptions
            {
                PrimaryButtonText = "Enter values"
            },
            cancellationToken: stoppingToken);

        if (result.Data)
        {
            await interactionService.PromptInputsAsync(
                "Input",
                "Please enter some input",
                [
                        new InteractionInput { InputType = InputType.Text, Label = "One", },
                        new InteractionInput { InputType = InputType.Text, Label = "Two", },
                ],
                new InputsDialogInteractionOptions
                {
                    ShowDismiss = false
                },
                stoppingToken);
        }
    }
}

cc James Newton-King (@JamesNK)

[davidfowl]

Does this affect any of the dialogs we shipped in 9.4 (parameters and azure?)