Riot shield blocks all interactions from other marines no matter what

## Testmerges
#8624: 'Centralized Overwatch Console' by SpypigDev at commit 1d40b2a0f1
#8725: 'Adds laser designator targetting to mortar' by casperr04 at commit 4d79775e3d
#8779: 'Replaces the pred AI announcement with an Elder Overseer ' by Joelampost at commit 7ac83fa3ab
#8917: 'Tgui update follow up' by Kashargul at commit df1118c152
#8835: 'W-Y Content Nuke: Special Forces Overhaul' by Blundir at commit 4915b074bb

## Round ID
27104

## Description of the bug
A marine with a riot shield on their back blocks alot of really random things such as:
Trying to grab their dead body
Trying to use help intent to shake them awake
Trying to use help intent to do actions like fist bumping, rock paper scissors, and high five

## What's the difference with what should have happened?
Some of these interactions probably should still work with a riot shield (especially the grabbing their dead body part)

## How do we reproduce this bug?
1) Have a marine with a riot shield on their back
2) Attempt to do anything on any intent
3) bruh

## Attached logs
```
Trying to do a fistbump:
Romanye Mens raises his fist out for a fistbump from Irene.
The the riot shield on Romanye Mens's back blocks Irene!
Irene attempted to touch Romanye Mens!

Trying to grab a corpse after they went down:
The the riot shield on Romanye Mens's back blocks Irene!2
Irene attempted to touch Romanye Mens!2
Irene has grabbed Romanye Mens passively!
```

## Additional details
- Author: Birds2
- Admin: Detective Google
- Note: None