Intelephense (PHP language server) has a dependency on `protobufjs`
which invokes `node` in the `postinstall` script and if the user did
not have a system Node runtime installed that would fail. Have this
use our downloaded installation too
This will help cases where Node is broken causing Copilot to fail to
start but because it doesn't install via NPM we would not have caught
it prior.
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
