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ARROW-16165: [CI][Archery] Fix nightly query to crossbow to send reports

This PR fixes the current issue with our nightly reports as seen here: https://github.com/ursacomputing/crossbow/runs/5840285120?check_suite_focus=true)

The issue could be reproduced using the prefix that crossbow reports uses:
```
job_prefix=nightly-${{ inputs.report_type }}-$(date -I)
job_id=$(archery crossbow latest-prefix ${job_prefix})
```
Before the fix, when using the following query:
```
$ archery crossbow latest-prefix --no-fetch nightly-packaging-2022-04-10
Traceback (most recent call last):
  File "/home/raulcd/open_source/pyarrow-dev/bin/archery", line 33, in <module>
    sys.exit(load_entry_point('archery', 'console_scripts', 'archery')())
  File "/home/raulcd/open_source/pyarrow-dev/lib/python3.10/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/home/raulcd/open_source/pyarrow-dev/lib/python3.10/site-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/home/raulcd/open_source/pyarrow-dev/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/raulcd/open_source/pyarrow-dev/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/raulcd/open_source/pyarrow-dev/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/raulcd/open_source/pyarrow-dev/lib/python3.10/site-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/home/raulcd/open_source/pyarrow-dev/lib/python3.10/site-packages/click/decorators.py", line 38, in new_func
    return f(get_current_context().obj, *args, **kwargs)
  File "/home/raulcd/open_source/arrow/dev/archery/archery/crossbow/cli.py", line 237, in latest_prefix
    latest = queue.latest_for_prefix(prefix)
  File "/home/raulcd/open_source/arrow/dev/archery/archery/crossbow/core.py", line 568, in latest_for_prefix
    latest_id += "-0"
TypeError: unsupported operand type(s) for +=: 'int' and 'str'
```

After the fix:
```
$ archery crossbow latest-prefix --no-fetch nightly-packaging-2022-04-10
nightly-packaging-2022-04-10-0
$ archery crossbow latest-prefix --no-fetch nightly-packaging
nightly-packaging-2022-04-11-0
```

Closes #12862 from raulcd/ARROW-16165

Authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Signed-off-by: Jonathan Keane <jkeane@gmail.com>