Terminal renders badly in light mode with gpu acceleration

Does this issue occur when all extensions are disabled?: Yes

This is similar to #240774 but not the same. That issue is about experimental GPU acceleration in editor. In my case, GPU acceleration in the editor works fine, but in the terminal it's broken, so it is a different problem. [This comment](https://github.com/microsoft/vscode/issues/240774#issuecomment-4095727469) in the same issue also points out this same problem.

- VS Code Version: 1.129.1 (current version, but present long before)
- OS Version: Fedora 44 (KDE, Wayland)

Steps to Reproduce:

1. Enable light mode
2. Enable GPU acceleration in the terminal
3. Write anything in the terminal

The font renders really thin and jagged. However, this doesn't happen in Dark mode or without GPU acceleration.

Terminal in light mode:

Terminal in dark mode: