[NPU] Fix compiler clang build (openvinotoolkit#27405)

### Details:
 - *Change from define to constexpr and remove unused code*
 - *Fix clang build*

### Tickets:
 - *EISW-146067*

---------

Signed-off-by: Bogdan Pereanu <bogdan.pereanu@intel.com>

Author: pereanub

src/plugins/intel_npu/src/al/include/intel_npu/prefix.hpp

@@ -11,9 +11,9 @@ namespace intel_npu {
 //
 // Prefix for ReadValue and Assign operations in compiler.
 //
-#define READVALUE_PREFIX    std::string("vpux_ie_read_value_")
-#define ASSIGN_PREFIX       std::string("vpux_ie_assign_")
-#define SHAPE_TENSOR_PREFIX std::string("vpux_ie_shape_")
+constexpr std::string_view READVALUE_PREFIX = "vpux_ie_read_value_";
+constexpr std::string_view ASSIGN_PREFIX = "vpux_ie_assign_";
+constexpr std::string_view SHAPE_TENSOR_PREFIX = "vpux_ie_shape_";
 
 inline bool isStateInputName(const std::string& name) {
     return !name.compare(0, READVALUE_PREFIX.length(), READVALUE_PREFIX);
@@ -25,8 +25,4 @@ inline bool isShapeTensorName(const std::string& name) {
     return !name.compare(0, SHAPE_TENSOR_PREFIX.length(), SHAPE_TENSOR_PREFIX);
 }
 
-inline std::string stateOutputToStateInputName(const std::string& name) {
-    return READVALUE_PREFIX + name.substr(ASSIGN_PREFIX.length());
-}
-
 }  // namespace intel_npu

src/plugins/intel_npu/src/compiler_adapter/src/ze_graph_ext_wrappers.cpp

@@ -396,7 +396,6 @@ ze_graph_handle_t ZeGraphExtWrappers<TableExtension>::getGraphHandle(
     const uint32_t& flags) const {
     ze_graph_handle_t graphHandle;
 
-    _logger.info("compileIR Using extension version: %s", typeid(TableExtension).name());
     createGraph(std::move(serializedIR), buildFlags, flags, &graphHandle);
 
     return graphHandle;

src/plugins/intel_npu/src/utils/include/intel_npu/utils/zero/zero_types.hpp

@@ -70,7 +70,7 @@ struct ze_graph_dditable_ext_decorator final {
     }
     ~ze_graph_dditable_ext_decorator() = default;
 
-    inline const uint32_t version() const {
+    inline uint32_t version() const {
         return _driverExtVersion;
     }
 
@@ -202,7 +202,7 @@ struct ze_command_queue_npu_dditable_ext_decorator final {
           _commandQueueExtVersion(commandQueueExtVersion) {}
     ~ze_command_queue_npu_dditable_ext_decorator() = default;
 
-    inline const uint32_t version() const {
+    inline uint32_t version() const {
         return _commandQueueExtVersion;
     }