TTF glyphs are antialiased against non-transparent background

TTF glyphs have unwanted "outline" effect.

This issue closely relates to MC-207500.

How to replicate:

1. Install resource pack "ttf resoucepack.zip" from attachments and select it.
2. See any font on very contrast background. (ex. White Text + Snow + /time set day)

Dummy command used to make screenshot:

/title @s title "ABCDEFGHIJKLMNOPQRSTUVWXYZ"