[BUILD] Fix build for esp32 (open-telemetry#3155)

Author: albkharisov

sdk/include/opentelemetry/sdk/common/empty_attributes.h

@@ -21,12 +21,12 @@ namespace sdk
  * with default attributes.
  */
 static const opentelemetry::common::KeyValueIterableView<
-    std::array<std::pair<std::string, int>, 0>> &
+    std::array<std::pair<std::string, int32_t>, 0>> &
 GetEmptyAttributes() noexcept
 {
-  static const std::array<std::pair<std::string, int>, 0> array{};
+  static const std::array<std::pair<std::string, int32_t>, 0> array{};
   static const opentelemetry::common::KeyValueIterableView<
-      std::array<std::pair<std::string, int>, 0>>
+      std::array<std::pair<std::string, int32_t>, 0>>
       kEmptyAttributes(array);
 
   return kEmptyAttributes;

sdk/include/opentelemetry/sdk/trace/span_data.h

@@ -257,7 +257,7 @@ class SpanData final : public Recordable
                 opentelemetry::common::SystemTimestamp timestamp =
                     opentelemetry::common::SystemTimestamp(std::chrono::system_clock::now()),
                 const opentelemetry::common::KeyValueIterable &attributes =
-                    opentelemetry::common::KeyValueIterableView<std::map<std::string, int>>(
+                    opentelemetry::common::KeyValueIterableView<std::map<std::string, int32_t>>(
                         {})) noexcept override
   {
     SpanDataEvent event(std::string(name), timestamp, attributes);