Reworks assignment identification for sec HUDs

[Puckaboo2]

About the pull request

Part 2 of atomizing #11382

1. Removes the extra assignment icons from sec HUDs.
2. Reworks the above to be a card identifier, instead. A green checkmark means the person's name matches their ID and can be used for authorization, if needed; a red X means the person's name does not match their ID; and a grey question mark means the person does not have an ID on them.
   Changes have been tested.

Explain why it's good for the game

1. The code for security HUDs identifying a mob's assignment predated the radio faction-related hud system we have today, resulting in double hud icons. I removed the extraneous icons and replaced them with a more practical system because we can already identify a person's assignment if they're within our faction group--and if they're not, tough beans, ask them.

2. This system is much more simple for people to understand. If a person's assignment cannot be identified because they are not within our faction, check the status of their ID. If it's green, yay. If red, that's somebody else's ID and that person should be investigated; if grey, they need an ID.

Screenshots & Videos

Changelog

🆑 Puckaboo2
add: Adds a feature for sec HUDs that identifies whether a person is holding their own ID, somebody else's ID, or no ID at all for authentication and authorization purposes.
code: Deleted a handful of lines of code and replaced one-variable vars when possible.
fix: Fixes the issue where the sec HUD says the person does not have a viable assignment despite showing up on the radio's faction HUD feature.
imageadd: Adds new hud icons for security HUDs based on whether a person is holding their own card, somebody else's card, or has no card at all.
imagedel: Removes the assignment-related overlays on sec HUDs.
/:cl: