Improve usability of `queue_with_itemdata`. #7064
Improve usability of `queue_with_itemdata`. #7064

- Rename keyword argument from `from` to `itemdata`.
- Accept iterables in addition to iterators.
- Values provided to the method are converted to strings where possible.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor