Make it possible to opt-out of the aspire dashboard in container app environment resource

[davidfowl]

Today we always enable the aspire dashboard on the container app environment, we should allow users to turn it off via a WithDashboard(bool) method. If false it would skip this resource

aspire/src/Aspire.Hosting.Azure.AppContainers/AzureContainerAppExtensions.cs

Lines 155 to 160 in 48856df

	var dashboard = new ContainerAppEnvironmentDotnetComponentResource("aspireDashboard", "2024-10-02-preview")
	{
	Name = "aspire-dashboard",
	ComponentType = "AspireDashboard",
	Parent = containerAppEnvironment
	};