Enforce aggs interface (elastic#121898)

(cherry picked from commit a57b985)

Author: idegtiarenko

x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/AggregatorImplementer.java

@@ -95,8 +95,7 @@ public AggregatorImplementer(
 
         this.init = requireStaticMethod(
             declarationType,
-            // This should be more restrictive and require org.elasticsearch.compute.aggregation.AggregatorState
-            requirePrimitiveOrImplements(elements, Types.RELEASABLE),
+            requirePrimitiveOrImplements(elements, Types.AGGREGATOR_STATE),
             requireName("init", "initSingle"),
             requireAnyArgs("<arbitrary init arguments>")
         );

x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/GroupingAggregatorImplementer.java

@@ -99,8 +99,7 @@ public GroupingAggregatorImplementer(
 
         this.init = requireStaticMethod(
             declarationType,
-            // This should be more restrictive and require org.elasticsearch.compute.aggregation.GroupingAggregatorState
-            requirePrimitiveOrImplements(elements, Types.RELEASABLE),
+            requirePrimitiveOrImplements(elements, Types.GROUPING_AGGREGATOR_STATE),
             requireName("init", "initGrouping"),
             requireAnyArgs("<arbitrary init arguments>")
         );

x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/Types.java

@@ -79,6 +79,9 @@ public class Types {
     static final ClassName DOUBLE_VECTOR_FIXED_BUILDER = ClassName.get(DATA_PACKAGE, "DoubleVector", "FixedBuilder");
     static final ClassName FLOAT_VECTOR_FIXED_BUILDER = ClassName.get(DATA_PACKAGE, "FloatVector", "FixedBuilder");
 
+    static final ClassName AGGREGATOR_STATE = ClassName.get(AGGREGATION_PACKAGE, "AggregatorState");
+    static final ClassName GROUPING_AGGREGATOR_STATE = ClassName.get(AGGREGATION_PACKAGE, "GroupingAggregatorState");
+
     static final ClassName AGGREGATOR_FUNCTION = ClassName.get(AGGREGATION_PACKAGE, "AggregatorFunction");
     static final ClassName AGGREGATOR_FUNCTION_SUPPLIER = ClassName.get(AGGREGATION_PACKAGE, "AggregatorFunctionSupplier");
     static final ClassName GROUPING_AGGREGATOR_FUNCTION = ClassName.get(AGGREGATION_PACKAGE, "GroupingAggregatorFunction");