Fix iwyu

Author: ThomsonTan

sdk/test/metrics/async_metric_storage_test.cc

@@ -17,15 +17,17 @@
 #include "opentelemetry/nostd/span.h"
 #include "opentelemetry/nostd/variant.h"
 #include "opentelemetry/sdk/instrumentationscope/instrumentation_scope.h"
+#include "opentelemetry/sdk/metrics/data/exemplar_data.h"
 #include "opentelemetry/sdk/metrics/data/metric_data.h"
 #include "opentelemetry/sdk/metrics/data/point_data.h"
+#include "opentelemetry/sdk/metrics/exemplar/filter_type.h"
+#include "opentelemetry/sdk/metrics/exemplar/reservoir.h"
 #include "opentelemetry/sdk/metrics/export/metric_producer.h"
 #include "opentelemetry/sdk/metrics/instruments.h"
 #include "opentelemetry/sdk/metrics/state/async_metric_storage.h"
 #include "opentelemetry/sdk/metrics/state/attributes_hashmap.h"
 #include "opentelemetry/sdk/metrics/state/filtered_ordered_attribute_map.h"
 #include "opentelemetry/sdk/metrics/state/metric_collector.h"
-#include "opentelemetry/sdk/metrics/view/attributes_processor.h"
 
 #ifdef ENABLE_METRICS_EXEMPLAR_PREVIEW
 #  include "opentelemetry/sdk/metrics/exemplar/filter_type.h"

sdk/test/metrics/cardinality_limit_test.cc

@@ -20,9 +20,12 @@
 #include "opentelemetry/nostd/span.h"
 #include "opentelemetry/nostd/variant.h"
 #include "opentelemetry/sdk/metrics/aggregation/aggregation.h"
+#include "opentelemetry/sdk/metrics/aggregation/aggregation_config.h"
 #include "opentelemetry/sdk/metrics/aggregation/sum_aggregation.h"
 #include "opentelemetry/sdk/metrics/data/metric_data.h"
 #include "opentelemetry/sdk/metrics/data/point_data.h"
+#include "opentelemetry/sdk/metrics/exemplar/filter_type.h"
+#include "opentelemetry/sdk/metrics/exemplar/reservoir.h"
 #include "opentelemetry/sdk/metrics/instruments.h"
 #include "opentelemetry/sdk/metrics/state/attributes_hashmap.h"
 #include "opentelemetry/sdk/metrics/state/filtered_ordered_attribute_map.h"

sdk/test/metrics/sum_aggregation_test.cc

@@ -2,7 +2,9 @@
 // SPDX-License-Identifier: Apache-2.0
 
 #include <gtest/gtest.h>
+#include <stddef.h>
 #include <initializer_list>
+#include <map>
 #include <string>
 #include <unordered_map>
 #include <utility>