Revert "Update dependency rollup to v3 (#58252)" (#63790)

This reverts commit a97e9a1e17.

packages/grafana-ui/rollup.config.ts

@@ -0,0 +1,38 @@
+import resolve from '@rollup/plugin-node-resolve';
+import path from 'path';
+import dts from 'rollup-plugin-dts';
+import esbuild from 'rollup-plugin-esbuild';
+import { externals } from 'rollup-plugin-node-externals';
+import svg from 'rollup-plugin-svg-import';
+
+const pkg = require('./package.json');
+
+export default [
+  {
+    input: 'src/index.ts',
+    plugins: [externals({ deps: true, packagePath: './package.json' }), resolve(), svg({ stringify: true }), esbuild()],
+    output: [
+      {
+        format: 'cjs',
+        sourcemap: true,
+        dir: path.dirname(pkg.publishConfig.main),
+      },
+      {
+        format: 'esm',
+        sourcemap: true,
+        dir: path.dirname(pkg.publishConfig.module),
+        preserveModules: true,
+        // @ts-expect-error (TS cannot assure that `process.env.PROJECT_CWD` is a string)
+        preserveModulesRoot: path.join(process.env.PROJECT_CWD, `packages/grafana-ui/src`),
+      },
+    ],
+  },
+  {
+    input: './compiled/index.d.ts',
+    plugins: [dts()],
+    output: {
+      file: pkg.publishConfig.types,
+      format: 'es',
+    },
+  },
+];