Add step for syncing time tracking fields

[davehunt]

I learned today that Bugzilla has fields for tracking time estimates:

As these map to Jira fields, it would be great to have a maybe_update_time_tracking step to JBI.

I think this should be possible via by performing an issue update with a payload similar to:

{
    "fields": {
         "timetracking": {
            "originalEstimate": "5h",
            "remainingEstimate": "3h"
         },
         "duedate" : "2026-02-28"
    }
}

This of course needs verifying. I think time spent might be a little more involved as Jira uses work logs to track time spent. It may be worth investigating though.

Note that in order to see the time tracking fields in Bugzilla you need to be added to a specific group. We should note that in the documentation of any new steps.

I intend to look into this, but currently waiting on #1247.