Fix Non-Mapbox Scatter with text markers

[TillerBurr]

Fixes #4110

Added glyphs as suggested in mapbox/mapbox-gl-js#4808

Any font from openmaptiles/fonts is acceptable to use as the textfont.

[TillerBurr]

Not sure why the baselines failed. Only scattermapbox, mapbox.constants and scatter.text_defaults were modified, but scatter.text_defaults is only used with scatter type plots.

[archmoj]

Not sure why the baselines failed. Only scattermapbox, mapbox.constants and scatter.text_defaults were modified, but scatter.text_defaults is only used with scatter type plots.

Thanks very much for the PR.

Considering a bug in our image test system we need to preserve the order of baseline creation in parallel runs.
For non mapbox baseline we suggest to use zz- at the start of mock & baseline names.
But since you added a new mapbox mock in this PR and we want to allow some tolerance for mapbox, you need to download (from here & replace these new baselines inside test/image/baseline folder.
That should help tests go green.
Thank you!

[archmoj]

💃