Merge branch 'webpack-logs' into 'master'

Remove error/warning logs from Webpack manifest

See merge request gitlab-org/gitlab!33918

config/webpack.config.js

@@ -327,6 +327,8 @@ module.exports = {
           chunks: false,
           modules: false,
           assets: true,
+          errors: !IS_PRODUCTION,
+          warnings: !IS_PRODUCTION,
         });
 
         // tell our rails helper where to find the DLL files