Adds "splat" sound effect for banana cream pie

[FloFluoro]

What Does This PR Do

Adds a "splat" sound effect for thrown banana cream pies.

Sound effect is derived from a public domain (CC0 1.0) audio archive - https://opengameart.org/content/8-wet-squish-slurp-impacts

Why It's Good For The Game

The current sound effect (a quiet tap) is very anemic. You're getting hit in the face by a pie, now it sounds like it.

Video of changes

https://user-images.githubusercontent.com/3611705/193722845-cd89dae9-691e-4705-b2a8-8223c5a47ef5.mp4

Testing

Compiled and tested on local debug server. The pie is audible.

Changelog

:cl: soundadd: Banana cream pie now has its own sound effect /:cl:

[Landerlow]

Yes. Honk.

[hal9000PR]

this PR has been open for 30 days with 1 objection and nobody in favour and so it will be closed.