[Feature:Autograding] Add Erlang image

[ION606]

Please check if the PR fulfills these requirements:

• Tests for the changes have been added/updated (if possible)
• Documentation has been updated/added if relevant

What is the current behavior?

N/A

What is the new behavior?

Can now run Erlang files

Other information?

I tested it using the code below

-module(concurrency).
-export([start/0, process/0]).

start() ->
    Pid = spawn(concurrency, process, []),
    Pid ! {self(), "Hello"},
    receive
        {Pid, Msg} -> io:format("Received message: ~p~n", [Msg])
    end.

process() ->
    receive
        {Sender, Msg} ->
            Sender ! {self(), Msg}
    end.

[cjreed121]

CI took over an hour to build. Is there a reason you chose to build from source rather than install from apt?

[ION606]

CI took over an hour to build. Is there a reason you chose to build from source rather than install from apt?

According to this and also my own testing (see image below) it does not appear that I can install the version of erlang we need using apt

I'm not sure why it's taking so long to build, it took me 240s to build completely. I'll try using erlang-solutions and see if it's faster

[DarthNyan]

Looks good to me.