Allow toil-debug-job to select jobs by WDL name/display name

[unito-bot]

If I know that a particular WDL job failed, I should be able to rerun it locally and debug it with toil debug-job without knowing its actual Toil job store ID. I should be able to refer to it by a WDL-level identifier.

┆Issue is synchronized with this Jira Story ┆Epic: Improve debugging experience ┆Issue Number: TOIL-1510