Fixed integration tests fails due to pipeline not freed

src/Algorithm.cpp

@@ -332,6 +332,7 @@ Algorithm::createPipeline()
     vk::Pipeline pipeline =
       this->mDevice->createComputePipeline(*this->mPipelineCache, pipelineInfo);
     this->mPipeline = std::make_shared<vk::Pipeline>(pipeline);
+    this->mFreePipeline = true;
 #endif
 
     // TODO: Update to consistent

src/Manager.cpp

@@ -117,7 +117,6 @@ Manager::destroy() {
     if (this->mDebugReportCallback) {
         this->mInstance->destroyDebugReportCallbackEXT(
           this->mDebugReportCallback, nullptr, this->mDebugDispatcher);
-        this->mInstance = nullptr;
         KP_LOG_DEBUG("Kompute Manager Destroyed Debug Report Callback");
     }
 #endif