Players Jobbanned from Antagonist Roles cannot be spawned as, or converted to, them

They are instead force ghosted, so it's not taken as free immunity from conversion.
-A cult conversion attempt that fails due to the victim being jobbanned will reward the cultists with a free single-use supply talisman
-Robot factories will kill the victim instead of converting if they are jobbanned from cyborg
Missing commit
Update runes.dm
Update flash.dm
-Removed cultist recompense from attempting to convert a jobbanned player
-Jobbanned players will now get replaced by a ghost that is not AFK, has it toggled on in preferences, and is not jobbanned itself
-Procs that have to do with spawning an antag will now check if the candidate is jobbanned before picking them
Resolve conflicts:
	code/game/gamemodes/cult/runes.dm
Every time we would have pulled a random ghost into a mob, we will poll the ghosts for volunteers first.
Merge pull request #4440 from Ikarrus/antagjobbans_actually_worth_a_damn

Players Jobbanned from Antagonist Roles cannot be spawned as, or converted to, them