miqGridCheckedRows - handle checkboxes where the id is a part of the name, not value
miqGridCheckedRows - handle checkboxes where the id is a part of the name, not value

This makes miqGridCheckedRows be able to handle not only `whatever: 1r123` but also `check_1r123: 1`, fixing a bug introduced by #5532.
(transferred from ManageIQ/manageiq@7e74f1430170deadaae34efbc519104b392ce965)

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic