Aspire Dev Tunnel creates duplicate tunnel name if file paths are the same across developer workstations

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

Confirmed by folks on the discord channel, this bug is related to Dev Tunnels using a `AppHost:Sha256` configuration on start to name the tunnel. If the repo is cloned and run by people with the same path (i.e. `C:\source\repos\MyProject`), then the tunnel names will be identical and the second person to clone will be unable to start the tunnel.

https://github.com/dotnet/aspire/blob/b4fa644d7ce151c0c8e92ebf70054b53c953d726/src/Aspire.Hosting/DistributedApplicationBuilder.cs#L272

### Expected Behavior

Each Dev Tunnel should use a unique name for the tunnel ID.

### Steps To Reproduce

- Create an Aspire project with a Dev Tunnel on `C:\projects\MyProject` on PC1.
- Start the project and observe the tunnel ID.
- Clone the project on PC2 and run the project.
- Observe the tunnel does not start and produces an error indicating the tunnel name already exists.

### Exceptions (if any)

_No response_

### .NET Version info

.NET 10

### Anything else?

_No response_