What kind of change does this PR introduce?

Previously, the bundled result of test/js/ConfigTestCases/externals/import-attributes/bundle0.mjs was incorrect as below. It should be ./pkg.json because ESM requires a fully specified path.

/***/ ((module) => {

module.exports = import("./pkg", { with: {"type":"json"} });;

/***/ }),

I'm not sure the reason it's not panicked in webpack test, as webpack test is simulating many stuff like the runtime. But it did panic in Rspack ported webpack test (they're not fully aligned). However, according to the output code, it should be fixed this way.

Did you add tests for your changes?

Yes.

Does this PR introduce a breaking change?

No.

What needs to be documented once your changes are merged?

No.