[Fix] (GLImpl): report GL_NO_ERROR from glGetGraphicsResetStatus

- The generic export stub returned (GLenum)1; dEQP reads any non-zero status as a lost device
- It is polled after every case (gl3cTestPackages.cpp:121) and sets QP_TEST_RESULT_DEVICE_LOST
- Under the default --deqp-terminate-on-device-lost=enable that tears the whole CTS run down
- MobileGL tracks no GPU resets, so GL_NO_ERROR ("no reset detected") is the honest, spec-correct answer
- Routed through GLImpl::GetGraphicsResetStatus like every other entry point, no inline body in Definitions.cpp

MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.h

@@ -21,4 +21,5 @@ namespace MobileGL::MG_Impl::GLImpl {
     void GetIntegeri_v(GLenum target, GLuint index, GLint* data);
     void GetInteger64i_v(GLenum target, GLuint index, GLint64* data);
     GLenum GetError();
+    GLenum GetGraphicsResetStatus();
 } // namespace MobileGL::MG_Impl::GLImpl