feat: add more e2e tests for MPR and add test mode and extension (#3180)

* tests: add various e2e tests for MPR and measurements

wip

add cypress config

feat: add mode and extension for testing

add hp applied through search params

add MPR tests

apply review comments

add more e2e tests

update yarn lock

* fix unit tests failing

.webpack/webpack.base.js

@@ -39,7 +39,7 @@ module.exports = (env, argv, { SRC_DIR, DIST_DIR }) => {
 
   const config = {
     mode: isProdBuild ? 'production' : 'development',
-    devtool: isProdBuild ? 'source-map' : 'eval-source-map',
+    devtool: isProdBuild ? 'source-map' : 'cheap-module-source-map',
     entry: {
       app: `${SRC_DIR}/index.js`,
     },