90368cc237
Updated the uniffi-bindgen-gecko-js code to use two things I've been experimenting with: * Use the IR pipeline code to generate the structs used to render the templates. * A new test fixture for bindings generators. This one targets bindings generators specifically, it doesn't try test the scaffolding code and it's not based on real-world example code. I originally thought it would be a single crate, but I ended up needed 2 in order to test external types. (https://bugzilla.mozilla.org/show_bug.cgi?id=1948961) Differential Revision: https://phabricator.services.mozilla.com/D242385