Package Manager Multi Select shows incorrect number of Packages that will be removed when the Selected Package has another Package installed as a Dependency

Steps to reproduce:

1. Open any Project
2. Open the Package Manager Window and install the Cinemachine Package and select it
3. In the Dependencies tab observe that the Cinemachine Package installs the Splines Package as a Dependency
4. In the Project Packages List select the Cinemachine Package and any other non Dependency Package (e.g. Input System)
5. Observe the Multi Select option to remove multiple Packages

Actual results: "Remove 2 Items" is displayed, indicating that only 2 Packages will be removed

Expected results: "Remove 2 Items" is misleading to users as in reality 3 Packages will be removed as the Splines Package will not be used by any other Package. If needed a separate indication that the third Package is a dependency can be added, but displaying that only 2 Items will be removed is wrong

Reproducible with versions: 6000.0.68f1, 6000.3.10f1, 6000.4.0b10, 6000.5.0a7

Tested on (OS): Windows 11