Incorrect TerminalShellExecution exit code

Does this issue occur when all extensions are disabled?: Yes/No

• VS Code Version: 1.94.0
• OS Version: macOS Sonoma 14.4

Steps to Reproduce:

1. Listen for onDidEndTerminalShellExecution events
2. Run a command that returns some exit code
3. Type the same command and interrupt with ^C (i.e. interrupt without actually running the command)
4. The exit code reported by the TerminalShellExecution event for the second execution (expected to be undefined since the command didn't actually run) will be the same as the previous command's exit code

For example:

$ echo test^C
-> exit code undefined
$ echo test
-> exit code 0
$ echo test^C
-> exit code 0
$ echo test^C
-> exit code 0
$ echo not test^C
-> exit code undefined
$ echo test^C
-> exit code undefined

From a quick look, this seems like caused by this code (marked as a hack): https://github.com/microsoft/vscode/blob/3b30f94f4f129e67be9b6c677aac582923da1fab/src/vs/platform/terminal/common/capabilities/commandDetectionCapability.ts#L360-L370