Better solution for exit animation

[Rashintawak]

A small improvement to avoid unnecessary movement in the lower body when exiting the animation. Allowing them to sit and have their hands up, for example.

Describe Pull request
I've encountered an issue while deploying a mod to sit after circling around a little bit, the best solution was to avoid the too absolute ClearPedTask and just canceling the animation you run, will allow a better integration with third party mod i think. Nice work, by the way :)

Questions (please complete the following information):

• Yes, especially with a third party script for sitting
• Not checked but is a very minor change
• Does your PR fit the contribution guidelines? [yes/no]