Removed ov::runtime namespace (#9781)

* Removed ov::runtime namespace

* clang-format

* Fixes

* template reference

* Fixes

samples/cpp/hello_query_device/README.md

@@ -6,7 +6,7 @@ Hello Query Device C++ sample application demonstrates how to use the following
 
 | Feature    | API  | Description |
 |:---     |:--- |:---
-|Available Devices|`ov::runtime::Core::get_available_devices`, `ov::runtime::Core::get_metric`, `ov::runtime::Core::get_config`| Get available devices information and configuration for inference
+|Available Devices|`ov::Core::get_available_devices`, `ov::Core::get_metric`, `ov::Core::get_config`| Get available devices information and configuration for inference
 
 Basic Inference Engine API is covered by [Hello Classification C++ sample](../hello_classification/README.md).
 

samples/cpp/hello_query_device/main.cpp

@@ -95,7 +95,7 @@ int main(int argc, char* argv[]) {
         }
 
         // -------- Step 1. Initialize OpenVINO Runtime Core --------
-        ov::runtime::Core core;
+        ov::Core core;
 
         // -------- Step 2. Get list of available devices --------
         std::vector<std::string> availableDevices = core.get_available_devices();