build: pin ChromeDriver version (#20940)

Since our version of Chromium is also pinned, a new ChromeDriver (that
drops support for our Chromium version) can cause random (and unrelated
to the corresponding changes) errors on CI.
This commit pins the version of ChromeDriver and it should now be
manually upgraded to a vrsion that is compatible with th currently used
Chromium version.

PR Close #20940

aio/package.json

@@ -56,7 +56,7 @@
     "~~check-env": "node scripts/check-environment",
     "~~build": "ng build --target=production --environment=stable -sm",
     "post~~build": "yarn sw-manifest && yarn sw-copy",
-    "~~update-webdriver": "webdriver-manager update --standalone false --gecko false"
+    "~~update-webdriver": "webdriver-manager update --standalone false --gecko false $CHROMEDRIVER_VERSION_ARG"
   },
   "engines": {
     "node": ">=8.9.1 <9.0.0",

aio/tools/examples/run-example-e2e.js

@@ -200,8 +200,10 @@ function runProtractorAoT(appDir, outputFile) {
 // All protractor output is appended to the outputFile.
 // CLI version
 function runE2eTestsCLI(appDir, outputFile) {
-  // --preserve-symlinks is needed due the symlinked node_modules in each example
-  const e2eSpawn = spawnExt('yarn', ['e2e', '--preserve-symlinks'], { cwd: appDir });
+  // `--preserve-symlinks` is needed due the symlinked `node_modules/` in each example.
+  // `--no-webdriver-update` is needed to preserve the ChromeDriver version already installed.
+  const args = ['e2e', '--preserve-symlinks', '--no-webdriver-update'];
+  const e2eSpawn = spawnExt('yarn', args, { cwd: appDir });
   return e2eSpawn.promise.then(
     function () {
       fs.appendFileSync(outputFile, `Passed: ${appDir}\n\n`);

aio/tools/examples/shared/package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "http-server": "http-server",
     "protractor": "protractor",
-    "webdriver:update": "webdriver-manager update --standalone false --gecko false",
+    "webdriver:update": "webdriver-manager update --standalone false --gecko false $CHROMEDRIVER_VERSION_ARG",
     "postinstall": "yarn webdriver:update"
   },
   "keywords": [],