Text displays with `see_through` set to 1 now z-fight with themselves

This behavior was introduced in 26.1-snapshot-10.

Steps to reproduce

1. Summon a text display nearby.

   summon minecraft:text_display ~ ~1 ~-2 {text: "Hello World"}

2. Look north at the text display.

3. Set the text display's see_through tag to true.

   data modify entity @n[type=minecraft:text_display] see_through set value 1b

4. Optionally, set the text display's shadow tag to true.

   data modify entity @n[type=minecraft:text_display] shadow set value 1b

Observed behavior

The text displayed by the display entity will z-fight with the background. If the text shadow is enabled, it, rather than the text, will z-fight with the background.

Expected behavior

The text and the text shadow would remain readable and clear, respectively, as was the case in previous versions.