An error message is displayed when any type of file is saved outside the project's assets folder

How to reproduce:

1. Open the project "IN-69590_SaveAssetinProject"
2. Open the “SampleScene” scene
3. Select any GameObject from the Hierarchy panel
4. Navigate to Window → Animation and open an Animation window
5. Press the “Create” button, navigate to the “Packages\com.unity.test” directory and press the “Save“ button

Expected result: The animation is saved inside the folder
Actual result: System displays an error message “You need to save the file inside of the project’s assets folder“

Reproducible with: 2021.3.35f1, 2022.3.20f1, 2023.2.12f1, 2023.3.0b9

Reproducible on: Windows 11 Pro (23H2)
Not reproducible on: No other environment tested

Note: The bug reproduces also with UI Toolkit and Visual Scripting Graph files