chore(ci): run hydration tests in ci

Author: wjhsf

.github/workflows/web-test-runner.yml

@@ -49,6 +49,7 @@ jobs:
             #       region: us
 
             - run: yarn test
+            - run: yarn test:hydration
 
     run-karma-tests:
         runs-on: ubuntu-22.04

packages/@lwc/integration-not-karma/package.json

@@ -4,7 +4,8 @@
     "version": "8.20.0",
     "scripts": {
         "start": "web-test-runner --manual",
-        "test": "web-test-runner"
+        "test": "web-test-runner",
+        "test:hydration": "web-test-runner --config web-test-runner.hydration.mjs"
     },
     "devDependencies": {
         "@lwc/compiler": "8.20.0",