Static llm pipeline: stateful model (#1240)

Related PRs:
- OpenVINO: *openvinotoolkit/openvino#27651
- OpenVINO Unroll SPDA:
*openvinotoolkit/openvino#27891
- OpenVINO Prefill/Generate sections:
*openvinotoolkit/openvino#28154
- OpenVINO LLMCompiledModel refactoring:
openvinotoolkit/openvino#28267

---------

Co-authored-by: Anatoliy Talamanov <anatoliy.talamanov@intel.com>
Co-authored-by: Ilya Lavrenov <ilya.lavrenov@intel.com>

src/cpp/src/llm_pipeline.cpp

@@ -20,13 +20,13 @@ namespace {
 
 /* 
 * NPU reads some properties from the config file, but when LLMPipeline is initialized
-* from the model_str and weights_tensor, there are not files. 
+* from the model_str and weights_tensor, there are no files.
 * In the later case ModelDesc is stored in properties.
 * This function pops ModelDescr from the the properties and returns a pair of updated properties and ModelDescr.
 */
-std::pair<ov::AnyMap, ov::genai::ModelConfigDesc> split_model_descr(const ov::AnyMap& properties) {
+std::pair<ov::AnyMap, ov::genai::static_llm::ModelConfigDesc> split_model_descr(const ov::AnyMap& properties) {
     ov::AnyMap main_properties = properties;
-    ov::genai::ModelConfigDesc model_descr;
+    ov::genai::static_llm::ModelConfigDesc model_descr;
 
     auto pop_property = [](ov::AnyMap& orig_propertis, const std::string& key, auto& value) {
         if (orig_propertis.find(key) != orig_propertis.end()) {
@@ -105,7 +105,7 @@ ov::genai::LLMPipeline::LLMPipeline(
         auto [plugin_config, scheduler_config] = utils::split_scheduler_config(properties);
         m_pimpl = std::make_unique<ContinuousBatchingAdapter>(models_path, tokenizer, scheduler_config, device, plugin_config);
     } else if (device == "NPU") {
-        m_pimpl = std::make_unique<StaticLLMPipeline>(models_path, tokenizer, device, properties);
+        m_pimpl = static_llm::LLMPipelineFactory::create(models_path, tokenizer, device, properties);
     } else {
         m_pimpl = std::make_unique<StatefulLLMPipeline>(models_path, tokenizer, device, properties);
     }
@@ -124,7 +124,7 @@ ov::genai::LLMPipeline::LLMPipeline(
         auto [device_properties, scheduler_config] = utils::split_scheduler_config(properties);
         m_pimpl = std::make_unique<ContinuousBatchingAdapter>(models_path, scheduler_config, device, device_properties);
     } else if (device == "NPU") {
-        m_pimpl = std::make_unique<StaticLLMPipeline>(models_path, device, properties);
+        m_pimpl = static_llm::LLMPipelineFactory::create(models_path, device, properties);
     } else {
         m_pimpl = std::make_unique<StatefulLLMPipeline>(models_path, device, properties);
     }
@@ -162,7 +162,7 @@ ov::genai::LLMPipeline::LLMPipeline(
         // This will convert from AnyMap to ModelDesc.
         auto [filtered_properties, model_descr] = split_model_descr(properties);
 
-        m_pimpl = std::make_unique<StaticLLMPipeline>(
+        m_pimpl = static_llm::LLMPipelineFactory::create(
             utils::singleton_core().read_model(model_str, weights_tensor), 
             model_descr,
             tokenizer,