I have a column of type `TIMESTAMP_NTZ` and it contains timestamp that I know are on UTC timezone. Mainly I want to convert to `TIMESTAMP_TZ` because I have other columns that are `TIMESTAMP_TZ` and I want to be able to do operations involving both.

I've tried to generate a `TIMESTAMP_TZ` in the following ways:

```
SELECT 
   '2019-10-24 12:07:24.000'::timestamp_ntz as orig -- a literal timestamp_ntz 
   ,convert_timezone('UTC', 'UTC', orig) -- the 3-args version of convert_timezone will always return a TIMESTAMP_NTZ
   ,convert_timezone('UTC', orig) -- the 2-args assumes that orig timezones is session's current timezone 
;

```

Just to be clear I want to convert `2019-10-24 12:07:24.000` to `2019-10-24 12:07:24.000 +0000`

Is there any function or operator in Snowflake that allows me to say treat this `TIMESTAMP_NTZ` as `TIMESTAMP_TZ` in timezone X?