rspack runtime into __webpack_require__.el to keep same module codegen result at hmr.

[underfin]

Webpack will generate runtime code with dynamic import like this.

// a.js
import('./b.js') // source code 
__webpack_require__.e("b_js") // webpack codegen code
__webpack_require__.el("./b.js")

But here has a question because the a.js codegen code has b.js chunk id.The rspack enable incremental rebuild by default. We will update b.js and b.js module should expected update at hmr, but sometimes the chunk id which includes b.js could has change, but the a.js codegen not update chunk id, because we expect the a.js codegen result should be reused.

So rspack into a runtime which called __webpack_require__.el, the example like this.

// a.js
import('./b.js') // source code 
__webpack_require__.el("./b.js") // rspack codegen code

The codegen code will always same at hmr, because it will not deply on chunk id of ./b.js，if the chunk id has change only changed the runtime code of __webpack_require__.el.