GSE-2738: Add ENTITIES AND TAGS column to non-ECS SnowAlert

[sfc-gh-bkou]

This has been tested on OZ. With the following steps:

1. Cloned this module repo locally.
2. Made the change, adding the ENTITIES AND TAGS columns locally
3. Modified the OZ SnowAlert TF locally to point to the local repo
4. Ran TF plan and apply to OZ
5. Created a dummy alert rule view with data in the two columns.
6. Validate that the snowalert.data.alerts view contains the dummy alert with data in the two columns.
   select * from snowalert.data.alerts where alert_time > dateadd(day, -1, current_timestamp) order by alert_time desc;

[sfc-gh-nlele]

lgtm!