Closes #45251

In https://github.com/zed-industries/zed/pull/44532 the syntax
highlighting of JS/TS was improved, but we only used `type.builtin` for
a specific case. This resulted in less consistent syntax highlighting.
Not all themes have this specific token and we don't use `type.builtin`
in other places either, so while this is a little less specific it is
more consistent.

Release Notes:

- Improved syntax highlighting consistency for builtins in JavaScript
and TypeScript