Optimize Docker Image Creation by Reusing Image Across The Same Project

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

I'm working on creating a device emulator farm using Aspire. As part of the process, I generate a Docker Compose file when I publish the project.

Currently, the Compose file is generated correctly. However, during the publishing process, Aspire creates a separate custom Docker image for each device configuration. This significantly increases the time it takes to publish, especially when multiple devices share the same base setup.

Ideally, I'd like to build the image only once and reuse it across all device configurations, using the project name (or similar) as the container name. This would greatly reduce build times and improve overall efficiency.

```c#
foreach (var device in deviceConfigurations)
{
builder
.AddProject("device-" + device.Id)
.WithEnvironment($"{nameof(DeviceConfiguration)}:{nameof(DeviceConfiguration.Id)}", device.Id)
.WithEnvironment($"{nameof(DeviceConfiguration)}:{nameof(DeviceConfiguration.Base64Certificate)}", device.Base64Certificate)
.WithEnvironment($"{nameof(ProvisioningConfiguration)}:{nameof(ProvisioningConfiguration.GlobalDeviceEndpoint)}", provisioningConfiguration.GlobalDeviceEndpoint)
.WithEnvironment($"{nameof(ProvisioningConfiguration)}:{nameof(ProvisioningConfiguration.IdScope)}", provisioningConfiguration.IdScope);
}
```

### Describe the solution you'd like

If possible, we should build the image only once and use the project name as the container name during the loop. This way, we avoid building the same image multiple times for each project.

### Additional context

_No response_