Revert "BS-8692: process instance deletion cascade deletion of archived elements of children elements too"

This reverts commit b86f062f9088af8d4e71ba01f282f1770bd2e998.
Revert "BS-8674: when deleting a processInstance, also delete its archived elements"

This reverts commit 149444c0b4b561377be87767bbe27060826d435d.