[NPUW] LLMCompiledModel refactoring part 1 (#34290)

This PR is a part of series tending to refactor monolith structure of
LLMCompiledModel with the goal to support different model types and
different compilation pipelines.

To do so all transformations done in LLMCompiledModel are wrapped into
ModelPasses.
The basic idea is to create transformation pipeline which can be used as
base for all model pipelines.

Current PR is mostly cosmetic and focused on wrapping all the
transformation into passes.

Author: AlexanderKalistratov

src/plugins/intel_npu/src/plugin/npuw/embedding_infer_request.cpp

@@ -1,4 +1,4 @@
-// Copyright (C) 2025 Intel Corporation
+// Copyright (C) 2018-2026 Intel Corporation
 // SPDX-License-Identifier: Apache-2.0
 //
 

src/plugins/intel_npu/src/plugin/npuw/embedding_infer_request.hpp

@@ -1,4 +1,4 @@
-// Copyright (C) 2025 Intel Corporation
+// Copyright (C) 2018-2026 Intel Corporation
 // SPDX-License-Identifier: Apache-2.0
 //
 

src/plugins/intel_npu/src/plugin/npuw/embedding_model_utils.cpp

@@ -370,9 +370,10 @@ class ReConstructEmbeddingModel : public ov::pass::ModelPass {
 
 }  // namespace
 
-void ov::npuw::util::prepare_text_embedding_model(std::shared_ptr<ov::Model> model, uint32_t seq_len_dim) {
+bool ov::npuw::util::PrepareTextEmbeddingModel::run_on_model(const std::shared_ptr<ov::Model>& model) {
     ov::pass::Manager manager("prepare-embedding");
     manager.set_per_pass_validation(true);
-    manager.register_pass<ReConstructEmbeddingModel>(seq_len_dim);
-    manager.run_passes(model);
+    manager.register_pass<ReConstructEmbeddingModel>(m_seq_len_dim);
+
+    return manager.run_passes(model);
 }

src/plugins/intel_npu/src/plugin/npuw/embedding_model_utils.hpp

@@ -1,4 +1,4 @@
-// Copyright (C) 2025 Intel Corporation
+// Copyright (C) 2018-2026 Intel Corporation
 // SPDX-License-Identifier: Apache-2.0
 //
 
@@ -8,6 +8,15 @@
 
 namespace ov ::npuw ::util {
 
-void prepare_text_embedding_model(std::shared_ptr<ov::Model> model, uint32_t seq_len_dim);
+class PrepareTextEmbeddingModel : public ov::pass::ModelPass {
+    uint32_t m_seq_len_dim;
+
+public:
+    OPENVINO_MODEL_PASS_RTTI("ov::npuw::PrepareTextEmbeddingModel");
+
+    explicit PrepareTextEmbeddingModel(uint32_t seq_len_dim) : m_seq_len_dim(seq_len_dim) {}
+
+    bool run_on_model(const std::shared_ptr<ov::Model>& model) override;
+};
 
 }  // namespace ov::npuw::util