Change setLocaleVariables to detectLocale

The setting is now an enum instead of boolean and defaults to auto
which should provide better detection and not set in cases where it
shouldn't.

Fixes #80072

src/vs/workbench/api/node/extHostTerminalService.ts

@@ -182,7 +182,7 @@ export class ExtHostTerminalService extends BaseExtHostTerminalService {
 			this._variableResolver,
 			isWorkspaceShellAllowed,
 			pkg.version,
-			terminalConfig.get<boolean>('setLocaleVariables', false),
+			terminalConfig.get<string>('detectLocale', 'auto'),
 			baseEnv
 		);