API Report::get_reports() returns native array (fixes #8096)
API Report::get_reports() returns native array (fixes #8096)

Used to return ArrayList, but since 9d74c99e08 its no
longer using keys, which they functionality using these return
values rely on. Hence the breakage of ReportAdmin,
since no report was being detected as "current" by looking
through the array keys.

silverstripe/silverstripe-cms,dhensby/silverstripe-cms,dhensby/silverstripe-cms,silverstripe/silverstripe-siteconfig,dhensby/silverstripe-cms,dhensby/silverstripe-reports,silverstripe-labs/silverstripe-reports,silverstripe-labs/silverstripe-reports,silverstripe/silverstripe-cms,jonom/silverstripe-cms,dhensby/silverstripe-reports,jonom/silverstripe-cms,helpfulrobot/i-lateral-silverstripe-siteconfig