fix: improve get_partition_batches to treat integers properly (#425)

Author: nicor88

dbt/include/athena/macros/materializations/models/helpers/get_partition_batches.sql

@@ -28,7 +28,7 @@
             {%- if col is none -%}
                 {%- set value = 'null' -%}
                 {%- set comp_func = ' is ' -%}
-            {%- elif column_type == 'integer' -%}
+            {%- elif column_type == 'integer' or column_type is none -%}
                 {%- set value = col | string -%}
             {%- elif column_type == 'string' -%}
                 {%- set value = "'" + col + "'" -%}