Update incremental.sql

Generate a unique tmp table suffix if required for incremental materializations.
Generate Spark-compatible tmp_table_suffix for incremental materializations.

dbt-athena/src/dbt/include/athena/macros/materializations/models/incremental/incremental.sql

@@ -13,14 +13,8 @@
   {% set temp_schema = config.get('temp_schema') %}
   {% set target_relation = this.incorporate(type='table') %}
   {% set existing_relation = load_relation(this) %}
-  -- If using insert_overwrite on Hive table, allow to set a unique tmp table suffix
-  {% if unique_tmp_table_suffix == True and strategy == 'insert_overwrite' and table_type == 'hive' %}
-    {% set tmp_table_suffix = adapter.generate_unique_temporary_table_suffix() %}
-  {% else %}
-    {% set tmp_table_suffix = '__dbt_tmp' %}
-  {% endif %}
-
-  {% if unique_tmp_table_suffix == True and table_type == 'iceberg' %}
+  -- Generate a unique tmp table suffix if required
+  {% if unique_tmp_table_suffix == True %}
     {% set raw_suffix = adapter.generate_unique_temporary_table_suffix() %}
     {% set tmp_table_suffix = raw_suffix.replace('-', '_') %}
   {% else %}