Update oracle stage, remove AS for alias of joined tables

Author: tkiehn

macros/staging/oracle/stage.sql

@@ -343,7 +343,7 @@ prejoined_columns AS (
     {%- endif -%}
       {%- set prejoin_alias = 'pj_' + loop.index|string %}
 
-      left join {{ relation }} as {{ prejoin_alias }}
+      left join {{ relation }} {{ prejoin_alias }}
         on {{ datavault4dbt.multikey(columns=prejoin['this_column_name'], prefix=['lcte', prejoin_alias], condition='=', operator=operator, right_columns=prejoin['ref_column_name']) }}
   {%- endfor -%}