various esp fixes & refactors

[crosby-moe]

Type of change

• Bug fix
• New feature

Description

Fixes:

• ESP glow no longer renders behind translucent blocks
• ESP alpha fade distance now calculates from the center of the entity instead of the corner
• Remove redundant framebuffer variable in storage outline shader

also refactored the post processing code to enforce final usage & remove dead code

Related issues

somehow never reported before lmao

How Has This Been Tested?

the J

Checklist:

• My code follows the style guidelines of this project.
• I have added comments to my code in more complex areas.
• I have tested the code in both development and production environments.