World border vignette reuses normal vignette texture, rather than having its own texture like nausea does

The bug

The texture used for the vignette when near the world border is the same as the texture used for the vignette in dark places. This is unexpected due to the vignette for nausea having its own texture file; it'd be expected as a result of that that the world border vignette and darkness vignette would use different textures as well, but this is not the case.

How to reproduce

A resource pack is attached to this ticket that retextures the normal vignette to "V" and the nausea vignette to "N".

1. Go into a dark place

2. Go near the world border

3. Eat a pufferfish

Expected results

The world border would not cause a V to appear on screen, and would be something different, like how the pufferfish creates an "N".

Actual results

It does create a V.

How to fix

Introduce a dedicated texture file for the world border vignette. This may also fix MC-139741.