When training on ".NET Framework4.8" project, the "xx.mlnet" file should be displayed as child level of "xx.mbconfig" file in "Solution Explorer" window, instead of same level.

**System Information (please complete the following information):**
Windows OS: Windows-11-Enterprise-22H2
ML.NET Model Builder 2022: 17.17.0.2346401 (Main Build)
Microsoft Visual Studio Enterprise: 2022(17.7.4)
.NET Framework: 4.8

**Describe the bug**
- On which step of the process did you run into an issue:
After training successfully, the "xx.mlnet" file should be displayed as child level of "xx.mbconfig" file in "Solution Explorer" window, instead of same level.

**Test Matrix**
https://testpass.blob.core.windows.net/test-pass-data/wikipedia-detox-250-line-data.tsv

**To Reproduce**
Steps to reproduce the behavior:
1. Select Create a new project from the Visual Studio start window.
2. Choose the C# Console App (**.NET Framework 4.8**) project template.
3. Add model builder by right click on the project.
4. Select **"Data classification"** scenario.
5. On Data page, choose the data source to complete the training.
6. After training successfully, check the generated "xx.mlnet" file in "Solution Explorer" window.

**Expected behavior**
The "xx.mlnet" file should be displayed as child level of "xx.mbconfig" file.

**Screenshot**

**Additional context**
The bug is not repro on ".NET Framework4.7.2", ".NET6.0", ".NET7.0".