`publishValueAsDefault` overload of `AddParameter` does not seem to affect publish/deploy

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

```csharp
public static IResourceBuilder AddParameter(this IDistributedApplicationBuilder builder, [ResourceName] string name, string value, bool publishValueAsDefault = false, bool secret = false)
```

The overload with `publishValueAsDefault` does not seem to affect any deployment-related behavior. It does not ask me for a parameter value when publishing.

Had a brief look at the source, may be wrong, the value getter is always getting the hard coded value.

### Expected Behavior

When setting `bool publishValueAsDefault = false`, it should ask me the value for publish.

### Steps To Reproduce

_No response_

### Exceptions (if any)

_No response_

### Aspire doctor output

_No response_

### Anything else?

_No response_

Start at the AddParameter overload shown in the issue and trace the value getter used during publishing and deployment. Reproduce the case with publishValueAsDefault set to false; done means publishing prompts for the parameter value instead of always using the hard-coded value.

Written by the indexing model from the issue text.