test: improve test-stream-duplex-readable-end

- Remove unneeded listener for the `'error'` event.
- Use `common.mustCall()`.
- Verify that the `src` stream gets paused.

PR-URL: https://github.com/nodejs/node/pull/36056
Refs: https://github.com/nodejs/node/pull/35941


Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Ricky Zhou <0x19951125@gmail.com>