Currently we have several pathways of printing stack traces, which each have a different format for printing things out:
1. When we hit the server with a SIGUSR2
2. When fasserting (invariant is probably the same)
3. Through heap profiling

Tools like db-contrib-tool symbolize or mongosymb.py work for one but not others. This makes it pretty annoying when trying to get line numbers from stack traces.

So this ticket is to either:
1. Print all stack traces in the same format, so that we can just use one tool, OR
2. Have one tool that can understand all stack trace formats