test: Exclude inaccessible elements by default in browser tests (#19380)

Author: eps1lon

test/karma.conf.js

@@ -54,6 +54,7 @@ module.exports = function setKarmaConfig(config) {
         new webpack.DefinePlugin({
           'process.env': {
             NODE_ENV: JSON.stringify('test'),
+            CI: JSON.stringify(process.env.CI),
           },
         }),
       ],