PlayerMovementInput does incorrect impulse calculation in 1.21.4+

[mankool0]

In PlayerMovementInput.tick() for sneaking we do:

boolean sneaking = handler.isInputForcedDown(Input.SNEAK);
if (sneaking) {
    this.leftImpulse    *= 0.3D;
    this.forwardImpulse *= 0.3D;
}

But in Minecraft 1.21.4+ the sneaking impulse scaling was moved from ClientInput.tick() to LocalPlayer.aiStep():

if (this.isMovingSlowly()) {
    float f = (float)this.getAttributeValue(Attributes.SNEAKING_SPEED); // default 0.3
    this.input.leftImpulse    *= f;
    this.input.forwardImpulse *= f;
}

So when Baritone sneaks we end up with * 0.3 being applied twice and in servers that use Grim AC you end up constantly failing the simulation check when crouching.

The fix is to just remove the scaling from PlayerMovementInput.tick().
I can do this but just want to know which branches I should cover. I can do all 1.21.4+ branches if needed.

[ZacSharp]

One pr for 1.21.4 should be enough, the newer versions will be covered once I merge up from 1.19.4 the next time.