ref(build): Use sucrase for es6 bundles (#5111)

This switches the building of our es6 CDN bundles to use sucrase instead of `tsc` (or, more accurately, to use the sucrase rollup plugin rather than the typescript rollup plugin), in order both to build more quickly (in a time trial of multiple runs on GHA, this change brings the average `yarn build` run down from ~8 minutes to ~4 minutes) and to ensure that we have exact code parity between our CDN bundles and our npm packages.

Because sucrase doesn't down-compile the way `tsc` will, the building of the es5 bundles hasn't been changed, and that build still uses the typescript plugin.

Author: lobsterkatie

rollup/bundleHelpers.js

@@ -11,6 +11,9 @@ import {
   makeIsDebugBuildPlugin,
   makeLicensePlugin,
   makeNodeResolvePlugin,
+  makeRemoveBlankLinesPlugin,
+  makeRemoveESLintCommentsPlugin,
+  makeSucrasePlugin,
   makeTerserPlugin,
   makeTSPlugin,
 } from './plugins/index.js';
@@ -20,6 +23,9 @@ export function makeBaseBundleConfig(options) {
   const { input, isAddOn, jsVersion, licenseTitle, outputFileBase } = options;
 
   const nodeResolvePlugin = makeNodeResolvePlugin();
+  const sucrasePlugin = makeSucrasePlugin();
+  const removeBlankLinesPlugin = makeRemoveBlankLinesPlugin();
+  const removeESLintCommentsPlugin = makeRemoveESLintCommentsPlugin();
   const markAsBrowserBuildPlugin = makeBrowserBuildPlugin(true);
   const licensePlugin = makeLicensePlugin(licenseTitle);
   const tsPlugin = makeTSPlugin(jsVersion.toLowerCase());
@@ -75,7 +81,17 @@ export function makeBaseBundleConfig(options) {
       strict: false,
       esModule: false,
     },
-    plugins: [tsPlugin, markAsBrowserBuildPlugin, nodeResolvePlugin, licensePlugin],
+    plugins:
+      jsVersion === 'es5'
+        ? [tsPlugin, markAsBrowserBuildPlugin, nodeResolvePlugin, licensePlugin]
+        : [
+            sucrasePlugin,
+            removeBlankLinesPlugin,
+            removeESLintCommentsPlugin,
+            markAsBrowserBuildPlugin,
+            nodeResolvePlugin,
+            licensePlugin,
+          ],
     treeshake: 'smallest',
   };