[C++][Compute] Implement integer to decimal cast

[asfimport]

Current cast kernel supports decimal to integer cast, but not integer to decimal.

Reporter: Yibo Cai / @cyb70289
Assignee: Yibo Cai / @cyb70289

PRs and other links:

• GitHub Pull Request #11045

_{Note: This issue was originally created as ARROW-13067. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
cc @lidavidm @edponce

[asfimport]

Eduardo Ponce / @edponce:
I am interested in tackling this issue as I have not worked directly with Decimal types and this seems like a good intro issue.

[asfimport]

Yibo Cai / @cyb70289:
@edponce, actually I already did some work, will be quick for a PR. Hope you didn't started yet :)

[asfimport]

Eduardo Ponce / @edponce:
Great! No problem, I have not worked on this. I am still wrapping up other issues.

[asfimport]

Yibo Cai / @cyb70289:
Issue resolved by pull request 11045
#11045

[asfimport]

Eduardo Ponce / @edponce:
@cyb70289 you can change status to Resolved. Thanks!

[asfimport]

Yibo Cai / @cyb70289:
Thanks @edponce for reminding.
Strange why this issue is not closed automatically by the pr merge script.