Use OV from master

Author: vshampor

.github/workflows/llama_cpp_plugin_build_and_test.yml

@@ -28,8 +28,7 @@ jobs:
         uses: actions/checkout@v3
         with:
           submodules: recursive
-          repository: vshampor/openvino
-          ref: llama_cpp_mod
+          repository: openvinotoolkit/openvino
           path: openvino
 
       - name: CMake - configure