Revert: Babel removal and runtime update (#63641)

* Revert "Update babel monorepo to v7.21.0 (#63532)"

This reverts commit 3d974fc716.

* Revert "Chore: Remove babel deps and config (#62461)"

This reverts commit 21a988a659.

packages/grafana-e2e/package.json

@@ -60,7 +60,7 @@
     "webpack": "5.75.0"
   },
   "dependencies": {
-    "@babel/core": "7.21.0",
+    "@babel/core": "7.20.5",
     "@babel/preset-env": "7.20.2",
     "@cypress/webpack-preprocessor": "5.17.0",
     "@grafana/e2e-selectors": "9.5.0-pre",

packages/grafana-ui/package.json

@@ -113,7 +113,7 @@
     "uuid": "9.0.0"
   },
   "devDependencies": {
-    "@babel/core": "7.21.0",
+    "@babel/core": "7.20.5",
     "@grafana/tsconfig": "^1.2.0-rc1",
     "@mdx-js/react": "1.6.22",
     "@rollup/plugin-node-resolve": "15.0.1",