video_core/renderer_opengl: Replace direct usage of global system object accessors

We already pass a reference to the system object to the constructor of the renderer,
so we can just use that instead of using the global accessor functions.

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -244,6 +244,21 @@ void RendererOpenGL::InitOpenGLObjects() {
     LoadColorToActiveGLTexture(0, 0, 0, 0, screen_info.texture);
 }
 
+void RendererOpenGL::AddTelemetryFields() {
+    const char* const gl_version{reinterpret_cast<char const*>(glGetString(GL_VERSION))};
+    const char* const gpu_vendor{reinterpret_cast<char const*>(glGetString(GL_VENDOR))};
+    const char* const gpu_model{reinterpret_cast<char const*>(glGetString(GL_RENDERER))};
+
+    LOG_INFO(Render_OpenGL, "GL_VERSION: {}", gl_version);
+    LOG_INFO(Render_OpenGL, "GL_VENDOR: {}", gpu_vendor);
+    LOG_INFO(Render_OpenGL, "GL_RENDERER: {}", gpu_model);
+
+    auto& telemetry_session = system.TelemetrySession();
+    telemetry_session.AddField(Telemetry::FieldType::UserSystem, "GPU_Vendor", gpu_vendor);
+    telemetry_session.AddField(Telemetry::FieldType::UserSystem, "GPU_Model", gpu_model);
+    telemetry_session.AddField(Telemetry::FieldType::UserSystem, "GPU_OpenGL_Version", gl_version);
+}
+
 void RendererOpenGL::CreateRasterizer() {
     if (rasterizer) {
         return;
@@ -466,17 +481,7 @@ bool RendererOpenGL::Init() {
         glDebugMessageCallback(DebugHandler, nullptr);
     }
 
-    const char* gl_version{reinterpret_cast<char const*>(glGetString(GL_VERSION))};
-    const char* gpu_vendor{reinterpret_cast<char const*>(glGetString(GL_VENDOR))};
-    const char* gpu_model{reinterpret_cast<char const*>(glGetString(GL_RENDERER))};
-
-    LOG_INFO(Render_OpenGL, "GL_VERSION: {}", gl_version);
-    LOG_INFO(Render_OpenGL, "GL_VENDOR: {}", gpu_vendor);
-    LOG_INFO(Render_OpenGL, "GL_RENDERER: {}", gpu_model);
-
-    Core::Telemetry().AddField(Telemetry::FieldType::UserSystem, "GPU_Vendor", gpu_vendor);
-    Core::Telemetry().AddField(Telemetry::FieldType::UserSystem, "GPU_Model", gpu_model);
-    Core::Telemetry().AddField(Telemetry::FieldType::UserSystem, "GPU_OpenGL_Version", gl_version);
+    AddTelemetryFields();
 
     if (!GLAD_GL_VERSION_4_3) {
         return false;

src/video_core/renderer_opengl/renderer_opengl.h

@@ -60,6 +60,7 @@ public:
 
 private:
     void InitOpenGLObjects();
+    void AddTelemetryFields();
     void CreateRasterizer();
 
     void ConfigureFramebufferTexture(TextureInfo& texture,