Recover subject name when called with pcall to get proper error messages

[RaphaelIT7]

This disastrous abomination of unholy code solves the current issue CFC-Servers/gmod_tests#25 is having
When you pass a function to pcall that will error directly, Lua has no idea what the name of it is, causing the error message to include '?' instead of for example 'Left'
This tries to fix that issue, it's bad, but it works really well in my testing.

And no, simply using debug.getinfo to get the name does not work, as the name will not be set for the subject so I fell back to reading the file to figure out the name :/
There probably is a better way, though this is the best that I came up, it may be a disaster, but it's a functional one :3

[sarahsturgeon]

lol this is wild

[sarahsturgeon]

I want to give this some more thought to figure out if this is the right way (or best short-term way) to approach this. Regardless, if we do go this way, I'd like to see some LuaLS typedocs for these functions. They're complex enough that having annotations could really help the reader understand.