`dotnet watch` hard exits when it cannot launch browser (due to custom log formatting) in .NET 9

### Describe the bug

If using custom log formatting (e.g. JSON) and `"launchBrowser": true` in launchSettings.json, `dotnet watch` will hard exit when it fails to launch the browser.

### To Reproduce

* Create a web project using .NET 9 SDK `dotnet new web`
* Add `builder.Logging.AddJsonConsole();` to `Program.cs` so the full source code is

```csharp
var builder = WebApplication.CreateBuilder(args);
builder.Logging.AddJsonConsole();
var app = builder.Build();
app.MapGet("/", () => "Hello World!");
app.Run();
```

* Run `dotnet watch`
* See an exception printed and the process exits with a non-zero return code. The underlying process that directly runs the project may be orphaned.

Note: If doing the same with .NET 8 SDK, you'd only see a message that says "Unable to launch the browser" but the process doesn't exit.

### Exceptions (if any)

```
Unhandled exception. System.FormatException: Input string was not in a correct format. Failure to parse near offset 51. Expected an ASCII digit.
at System.Text.ValueStringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ReadOnlySpan`1 args)
at System.String.FormatHelper(IFormatProvider provider, String format, ReadOnlySpan`1 args)
at System.String.Format(String format, Object[] args)
at Microsoft.Extensions.Tools.Internal.MessageDescriptor.TryGetMessage(String prefix, Object[] args, String& message)
at Microsoft.Extensions.Tools.Internal.ConsoleReporter.Report(MessageDescriptor descriptor, String prefix, Object[] args)
at Microsoft.Extensions.Tools.Internal.IReporter.Report(MessageDescriptor descriptor, Object[] args)
at Microsoft.Extensions.Tools.Internal.IReporter.Verbose(String message, String emoji)
at Microsoft.DotNet.Watcher.Tools.BrowserConnector.LaunchBrowser(LaunchSettingsProfile launchProfile, String launchUrl, BrowserRefreshServer server)
at Microsoft.DotNet.Watcher.Tools.BrowserConnector.<>c__DisplayClass11_0.g__handler|0(Object sender, DataReceivedEventArgs eventArgs)
at System.Diagnostics.AsyncStreamReader.FlushMessageQueue(Boolean rethrowInNewThread)
--- End of stack trace from previous location ---
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
```

### Further technical details

```
.NET SDK:
Version: 9.0.100-rc.2.24474.11
Commit: 315e1305db
Workload version: 9.0.100-manifests.cea95dba
MSBuild version: 17.12.0-preview-24473-03+fea15fbd1

Runtime Environment:
OS Name: Windows
OS Version: 10.0.19045
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\9.0.100-rc.2.24474.11\

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
Version: 9.0.0-rc.2.24473.5
Architecture: x64
Commit: 990ebf52fc

.NET SDKs installed:
8.0.403 [C:\Program Files\dotnet\sdk]
9.0.100-rc.2.24474.11 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.0-rc.2.24474.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.33 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.0-rc.2.24473.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.0-rc.2.24474.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download
```