[to_triage] Avoid crashing when running the tool on low priority time

I thought at first that this error was a regression of my recent changes; it turns out that the code crashes on weekends:

2022-07-16 18:24:45,546 - ERROR - Tool to_triage
Traceback (most recent call last):
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/bzcleaner.py", line 738, in run
    self.send_email(date=date)
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/bzcleaner.py", line 671, in send_email
    title, body = self.get_email(date)
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/bzcleaner.py", line 632, in get_email
    data = self.get_email_data(date, bug_ids)
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/bzcleaner.py", line 628, in get_email_data
    return self.organize(bugs)
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/bzcleaner.py", line 613, in organize
    return utils.organize(bugs, self.columns(), key=self.sort_columns())
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/utils.py", line 426, in organize
    res = [tuple(info[c] for c in columns) for info in bugs]
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/utils.py", line 426, in <listcomp>
    res = [tuple(info[c] for c in columns) for info in bugs]
  File "/Users/smujahid/repos/mozilla/relman-auto-nag/auto_nag/utils.py", line 426, in <genexpr>
    res = [tuple(info[c] for c in columns) for info in bugs]
KeyError: 'component'

https://github.com/mozilla/relman-auto-nag/blob/ab8f600876d2dd5d88d9122ae38f53930d1492cf/auto_nag/scripts/configs/tools.json#L411

The following two conditions should be moved or handled differently:

• https://github.com/mozilla/relman-auto-nag/blob/ab8f600876d2dd5d88d9122ae38f53930d1492cf/auto_nag/bzcleaner.py#L342-L345 This condition couses producing an incomplete bug dictionary (the bug will not be filtered out).

• https://github.com/mozilla/relman-auto-nag/blob/ab8f600876d2dd5d88d9122ae38f53930d1492cf/auto_nag/scripts/to_triage.py#L59-L62

Start with auto_nag/bzcleaner.py around lines 342-345 and 613-628, then inspect auto_nag/scripts/to_triage.py lines 59-62 and the tools.json configuration around line 411. Reproduce the weekend or low-priority run that reaches utils.organize and raises KeyError for component. Done means the tool no longer crashes and the affected bug is correctly filtered or represented completely.