MPS Expansion: Implement the Bubble Gun

[mcphedar]

Is your feature request related to a problem? Please describe. The bubble gun was a secondary weapon and alternative to the laser pistol. It was designed to fire a large, slow moving projectile that exploded on contact, dealing damage and knocking nearby players back. The bubble gun was not implemented for the initial MPS release. Only the model, VFX and SFX were created.

Asset Locations Model: https://github.com/o3de/o3de-multiplayersample-assets/tree/main/Gems/level_art_mps/Assets/BubbleGun VFX: Pending final locations for assets and docs Audio: Pending final locations for assets and docs

[lmbr-pip]

The plan was to have weapon switching and two distinct weapon types at least. Bubble gun is one such alternative weapon.