Markdown Code block in Interaction Service notification looks odd

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

Including a code block inside an interaction service notification is formatted a bit odd - the `code` label and copy icons look out of place.

### Expected Behavior

The spacing looks a bit too much, the `code` label doesn't need it's own line, nor does the `copy` icon.

### Steps To Reproduce

```cs
_ = interactionService.PromptNotificationAsync(
"Container runtime unhealthy",
$"""
Docker desktop failed to start. Please start it manually.
```
{new StackTrace()}
```
""",
new NotificationInteractionOptions
{
Intent = intent,
ShowDismiss = cancellationToken == default,
EnableMessageMarkdown = true
},
cancellationToken);
```

### Exceptions (if any)

_No response_

### .NET Version info

Aspire version: 13.1.0+8a4db1775c3fbae1c602022b636299cb04971fde

### Anything else?

Somewhat related to #11370 .