CONTRIBUTING: provide a template for new issues

_maybe_ we could even automate this to populate and complain in some
situations.

I see https://github.com/isaacs/github/issues/99 that is old and needs
some love from @github ...

Signed-off-by: Vincent Batts <vbatts@redhat.com>
issue report script

Add a script that will facilitate standard issue reports.

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
Merge pull request #8845 from vbatts/vbatts-issue_template

CONTRIBUTING: provide a template for new issues