test: drop now-empty remote runner (#35343)

* test: drop the now-empty remote runner from CI

* move fixtures to spec-main

* remove remote runner

* fix stuff

* remove global-paths hack

* move ts-smoke to spec/

* fix test after merge

* rename spec-main to spec

* no need to ignore spec/node_modules twice

* simplify spec-runner a little

* no need to hash pj/yl twice

* undo lint change to verify-mksnapshot.py

* excessive ..

* update electron_woa_testing.yml

* don't search for test-results-remote.xml

it is never produced now

spec/fixtures/sub-frames/preload.js

@@ -0,0 +1,9 @@
+const { ipcRenderer, webFrame } = require('electron');
+
+window.isolatedGlobal = true;
+
+ipcRenderer.send('preload-ran', window.location.href, webFrame.routingId);
+
+ipcRenderer.on('preload-ping', () => {
+  ipcRenderer.send('preload-pong', webFrame.routingId);
+});