Mouse tracking does not respect the system's `rows to scroll` setting

### Windows Terminal version

current main

### Windows build number

10.0.19045.4894

### Other Software

WSL + vim

### Steps to reproduce

1. Set the `rows to scroll` system setting to 5.
2. Run
```
wsl bash -c "vim -c :h"
```
3. Scroll the mouse wheel.

Type `:q` and press `Enter` (repeat twice) to quit.

### Expected Behavior

The cursor should move at the pace specified in the system-wide settings - 5 rows per 1 wheel step.

https://github.com/user-attachments/assets/81ccadb8-454c-44a9-bff6-9a046c0ab1d8

### Actual Behavior

The cursor moves at a speed of one row per mouse wheel step.

https://github.com/user-attachments/assets/aad547ef-c99d-4b32-9002-b35f26091c63

Reproduce the issue in Windows Terminal using the listed WSL and vim command after setting Windows' rows-to-scroll value to 5. Trace the mouse-wheel handling and verify that scrolling follows the system setting rather than moving one row per wheel step; repeat the reproduction to confirm the behavior is fixed.

Written by the indexing model from the issue text.