[Python] Accept bytes object in pyarrow.substrait.run_query

[asfimport]

pyarrow.substrait.run_query() only accepts a PyArrow buffer, and will segfault if something else is passed. People might try to pass a Python bytes object, which isn't unreasonable. For example, they might use the value returned by protobufs SerializeToString() function, which is Python bytes. At the very least, we should not segfault.

Reporter: Will Jones / @wjones127
Assignee: Miles Granger / @milesgranger

PRs and other links:

• GitHub Pull Request #14331

_{Note: This issue was originally created as ARROW-17944. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
cc @milesgranger

[asfimport]

Joris Van den Bossche / @jorisvandenbossche:
Issue resolved by pull request 14331
#14331