[C++] Add benchmark for aggregate min/max compute kernels

[asfimport]

Add benchmark for aggregate min/max compute kernels, similar to sum aggregate.

Reporter: Frank Du / @JianXinD
Assignee: Frank Du / @JianXinD

PRs and other links:

• GitHub Pull Request #7870

_{Note: This issue was originally created as ARROW-9604. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
Issue resolved by pull request 7870
#7870