Bug Description

This PR introduced the ability to externalize WASM, which is needed by distros to be able to rebuild all components shipped: #2643

PR #3074 broke this by removing some of the implementation needed.

Reproducible By

Build as specified in the undici CONTRIBUTING.md - https://github.com/nodejs/undici/blob/main/CONTRIBUTING.md#building-for-externally-shared-node-builtins

and validate that the wasm is not in the expected place

Expected Behavior

After building as described in the undici CONTRIBUTING.md - https://github.com/nodejs/undici/blob/main/CONTRIBUTING.md#building-for-externally-shared-node-builtins

the wasm binary should be in the expected place

Logs & Screenshots

Environment

Additional context