Re-introduce `name_regex_delete` as a non-deprecated field, and deprecate the proper `name_regex` field

Bug Report

In %16.0 , we deprecated the name_regex_deleted field in favor of using the name_regex field. However, as confirmed in !1466 (comment 1433553322), we unfortunately deprecated the wrong field. We should be supporting name_regex_deleted instead of name_regex.

This issue will un-deprecate the name_regex_deleted field and mark name_regex for removal in %17.0 . Until 17.0, we will support both attributes, and map the value from name_regex_deleted into both attributes.