Fix importing polyfill plugins in the Rollup bundle

[nicolo-ribaudo]

Q	A
Fixed Issues?	Fixes #13016
Patch: Bug Fix?	Yes
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass?	Yes
Documentation PR Link
Any Dependency Changes?
License	MIT

The polyfill plugins are ESM files compiled down to CJS, and thus they have an __esModule: true property.

When bundling CJS files that have the __esModule: true option, Rollup matches the default Babel interop and transforms import foo from "foo" to const foo = require("foo").default (rather than const foo = require("foo"), as Node.js does).

This PR introduces a small Babel plugins that rewrites those specific import foo to import * as foo when bundling.

I opened rollup/plugins#838 to see if the Rollup community is interested in aligning with Node.js.

[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/44374/

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Sandbox	Source
babel-repl-custom-plugin	Configuration
babel-plugin-multi-config	Configuration

[nicolo-ribaudo]

Merging since this is just a change in the build config and not in the source itself.

I'll revert once rollup/plugins#838 is merged.