Wither particles do not account for scale attribute

Particles emitted from the wither do not account for the wither's scale attribute, causing the particles to render in unusual places.

Steps to Reproduce:

1. Summon a wither with no AI

   /summon minecraft:wither ~ ~ ~ {NoAI:1b}

2. Modify the wither's scale

   /attribute @e[type=wither,limit=1] minecraft:generic.scale base set 0.25

Observed & Expected Results:

- The particles will be positioned where they do normally at a scale of 1.
- The particles would render in the correct position relative to the wither's new larger or smaller scale.

Screenshots/Videos:

WitherParticleScale.mp4

Notes:

1. Relations
   MC-267418 MC-267372 MC-267427 MC-267706 MC-267416 MC-267708
2. This issue was seperated off of MC-267416 in favor of all 'incorrect particle at scale' issues being their own report.