test(e2e): assert the dead overrideAuthType key is not written

Both docker e2e harnesses asserted the settings block contained
overrideAuthType. The setting does not exist in the modern Copilot Chat
extension, so the assertion pinned the defect in place; invert it.

Author: Tejas Chopra

e2e/wrap/run.py

@@ -796,8 +796,9 @@ def verify_vscode_wrap(base_env: dict[str, str], project_dir: Path) -> None:
             "VS Code wrap should route Copilot Chat generation through Headroom",
         )
         assert_true(
-            '"github.copilot.advanced.debug.overrideAuthType": "token"' in configured,
-            "VS Code wrap should configure token auth",
+            "overrideAuthType" not in configured,
+            "VS Code wrap must not write overrideAuthType: no such setting exists in "
+            "the modern Copilot Chat extension, so VS Code flags it as unknown (#3076)",
         )
         assert_true(
             "synthetic-e2e-token" not in configured, "Settings must not contain credentials"