tests: update BUILD.gn due to upstream CDT change (#16171)

Author: connorjclark

third-party/devtools-tests/e2e/lighthouse/BUILD.gn

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("../../../third_party/typescript/typescript.gni")
+import("../../../scripts/build/typescript/typescript.gni")
 
 node_ts_library("lighthouse") {
   sources = [