Rollup merge of #120597 - fmease:sugg-on-js-style-spread-op-in-pat, r=estebank

Suggest `[tail @ ..]` on `[..tail]` and `[...tail]` where `tail` is unresolved

Fixes #120591.
~~Will conflict with #120570~~ (rebased).

r? estebank or compiler

Author: matthiaskrgr