AddAzureWebAppDiagnostics throws an exception if used in combination with azure webapp zip deploy

### Is there an existing issue for this?

- [X] I have searched the existing issues
- This is to reopen an existing issue that was closed prematurely: https://github.com/dotnet/aspnetcore/issues/32964

### Describe the bug

We're still seeing exceptions, even with a newer version of the logging dependency

```
System.IO.FileNotFoundException: Error reading the C:\home\site\diagnostics\ directory.
?, in void FileSystemWatcher.StartRaisingEvents()
?, in void FileSystemWatcher.StartRaisingEventsIfNotDisposed()
?, in void FileSystemWatcher.set_EnableRaisingEvents(bool value)
?, in void PhysicalFilesWatcher.TryEnableFileSystemWatcher()
?, in IChangeToken PhysicalFilesWatcher.CreateFileChangeToken(string filter)
...
(4 additional frame(s) were not displayed)

System.AggregateException: One or more errors occurred.
?, in void CancellationTokenSource.ExecuteCallbackHandlers(bool throwOnFirstException)
?, in void PhysicalFilesWatcher._cancelTokenSource(object state)
?, in void Task.ExecuteWithThreadLocal(ref Task currentTaskSlot, Thread threadPoolThread)

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.
```

### Expected Behavior

We don't expect exceptions to be raised in accessing this directory

### Steps To Reproduce

* Run a dotnet 6 app service with deployment slots
* Deploy an artifact to Azure App Service with:

```
az webapp deployment source config-zip --resource-group {{rg}} --name {{appname}} --src artifact.zip --slot {{slotname}}
```

### Exceptions (if any)

```
System.IO.FileNotFoundException: Error reading the C:\home\site\diagnostics\ directory.
?, in void FileSystemWatcher.StartRaisingEvents()
?, in void FileSystemWatcher.StartRaisingEventsIfNotDisposed()
?, in void FileSystemWatcher.set_EnableRaisingEvents(bool value)
?, in void PhysicalFilesWatcher.TryEnableFileSystemWatcher()
?, in IChangeToken PhysicalFilesWatcher.CreateFileChangeToken(string filter)
...
(4 additional frame(s) were not displayed)

System.AggregateException: One or more errors occurred.
?, in void CancellationTokenSource.ExecuteCallbackHandlers(bool throwOnFirstException)
?, in void PhysicalFilesWatcher._cancelTokenSource(object state)
?, in void Task.ExecuteWithThreadLocal(ref Task currentTaskSlot, Thread threadPoolThread)

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.
```

### .NET Version

6.0.418

### Anything else?

_No response_

Start by reproducing the failure with AddAzureWebAppDiagnostics, a deployment slot, and the documented az webapp deployment source config-zip command. Trace the diagnostics directory access associated with the reported PhysicalFilesWatcher exception; done means zip deployment no longer raises the FileNotFoundException or unobserved aggregate exception.

Written by the indexing model from the issue text.