Fix offsets mismatch for HETERO plugin blob headers

Author: MirceaDan99

src/plugins/intel_npu/src/plugin/src/metadata.cpp

@@ -22,7 +22,7 @@ std::streampos getFileSize(std::istream& stream) {
     }
 
     if (dynamic_cast<ov::OwningSharedStreamBuffer*>(stream.rdbuf()) != nullptr) {
-        return stream.rdbuf()->in_avail() + stream.tellg();
+        return stream.rdbuf()->in_avail();
     }
 
     const std::streampos streamStart = stream.tellg();
@@ -123,7 +123,7 @@ std::unique_ptr<MetadataBase> read_metadata_from(std::istream& stream) {
     blobMagicBytes.resize(magicBytesSize);
 
     std::streampos currentStreamPos = stream.tellg(), streamSize = getFileSize(stream);
-    stream.seekg(-currentStreamPos + streamSize - magicBytesSize, std::ios::cur);
+    stream.seekg(streamSize - std::streampos(magicBytesSize), std::ios::cur);
     stream.read(blobMagicBytes.data(), magicBytesSize);
     if (MAGIC_BYTES != blobMagicBytes) {
         OPENVINO_THROW("Blob is missing NPU metadata!");

src/plugins/intel_npu/src/plugin/src/plugin.cpp

@@ -766,7 +766,7 @@ std::shared_ptr<ov::ICompiledModel> Plugin::import_model(std::istream& stream, c
         npu_plugin_properties.erase(ov::internal::cached_model_buffer.name());
     }
 
-    const std::map<std::string, std::string> propertiesMap = any_copy(npu_plugin_properties);
+    const auto propertiesMap = any_copy(npu_plugin_properties);
 
     auto localConfig = merge_configs(_globalConfig, propertiesMap, OptionMode::RunTime);
     _logger.setLevel(localConfig.get<LOG_LEVEL>());