Infrastructure to invoke a backtrace cleaner for failed jobs backtraces

[hms]

Adds a button to allow invoking a backtrace_cleaner on the backtrace of a failed job.

• Defaults to the standard Rails backtrace_cleaner
• Can be overridden with a user supplied backtrace_cleaner via an initializer

[hms]

@rosa Could I get this looked at and any feedback necessary to move it forward?

Hal

[rosa]

@hms yes! Sorry for the delay, I didn't have time last week to look at it but I had it in my plans. I'll try to review next week.

[hms]

@rosa

Hopefully I didn't cross a complexity line with this update. But I do believe I have addressed your valuable feedback and a little more.

@hms

[hms]

@rosa Are there still outstanding issues that I haven't addressed? I would love for this to get pushed so I can get back onto the mainline releases.

[rosa]

@hms sorry for the delay! All great now 👍 👍 Thanks for your patience!