Date/time types on x-axis of charts break new renderer

[carlineng]

What happens?

Using the new renderer with charts that have date/time types on the x-axis seems to break a few things:

1. line charts don't respect size tags
2. bar charts don't appear

To Reproduce

See the examples in this file: https://github.com/malloydata/malloy-samples/blob/ccfc9535b50ce8e6f8fb2dbe7960b3d24a876f09/ecommerce/datetime_render_example.malloy

OS:

macOS

Malloy Client:

VSCode (all)

Malloy Client Version:

pre-release

Database Connection:

DuckDB

[bporterfield]

currently hitting this +1

[whscullin]

cc @skokenes