Build: Force same version of @emotion/react via webpack config (#66822)

scripts/webpack/webpack.common.js

@@ -22,6 +22,9 @@ module.exports = {
       // some of data source plugins use global Prism object to add the language definition
       // we want to have same Prism object in core and in grafana/ui
       prismjs: require.resolve('prismjs'),
+      // some sub-dependencies use a different version of @emotion/react and generate warnings
+      // in the browser about @emotion/react loaded twice. We want to only load it once
+      '@emotion/react': require.resolve('@emotion/react'),
     },
     modules: ['node_modules', path.resolve('public')],
     fallback: {