Launching in Russian layout causes Ctrl+C and other signal chars to not work

### Windows Terminal version

1.19.11213.0

### Windows build number

10.0.19045.0

### Other Software

PSVersion 7.4.2
PSEdition Core
GitCommitId 7.4.2
OS Microsoft Windows 10.0.19045
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0

### Steps to reproduce

- Change your keyboard layout to Russian
- Open Windows Terminal
- Try Ctrl+C

### Expected Behavior

Sends interrupt

### Actual Behavior

Types C

Reproduce the issue using Windows Terminal 1.19.11213.0 with the Russian keyboard layout and PowerShell 7.4.2, then compare Ctrl+C and other signal characters with an English layout. Trace the terminal's keyboard and signal handling entry points; done means Ctrl+C sends an interrupt rather than typing C in the reported configuration.

Written by the indexing model from the issue text.