* Make memory lru gc the default

* undo yarn.lock

* Make memory lru gc the default

* Fix tests

Our v11 release will require node 18+. Since fetch has been introduced in these node versions, we can remove our dependency on third party fetch implementations.

This change removes our usage of fetch variants undici and node-fetch for our node target builds and our CI tools.

With the removal of fetch we no long need to create a node bundle for functions. Instead the sourcebase may become isomorphic, so long as we remove the older node sources. And that's what the PR does!

These should have been part of the bigger PR, but I missed these.

The rollup-typescript-plugin does not transpile JS files using the TS
compiler by default. This means that external dependencies that provide
JS bundles will not be transpiled to the target ES version specified in
the TypeScript config used by the plugin.

This resulted in one of our dependencies (https://github.com/jakearchibald/idb)
being included in the CDN bundles without being transpiled to
ES5 (the target ES version). Since this dependencies bundle uses
ES2018 syntax (object spread operator `{ ...x }`), this upgraded our CDN
bundles' minimum ES version requirement to ES2018 which isn't compatible with older browser versions.
To see the ES2018 syntax in one of the CDN bundles, see
https://www.gstatic.com/firebasejs/10.13.1/firebase-app.js and search for `...oldTraps`.