[Kandinsky tests] add `is_flaky` to test_model_cpu_offload_forward_pa… #107

Job	Run time
Setup Torch Pipelines CUDA Slow Tests Matrix	1s
Flax TPU Tests	1s
ONNX CUDA Tests	1s
PEFT CUDA Tests	1s
Torch CUDA Tests (models)	1s
Torch CUDA Tests (schedulers)	1s
Examples PyTorch CUDA tests on Ubuntu	1s
Torch CUDA Tests (lora)	1s
PyTorch Compile CUDA tests	1s
Torch CUDA Tests (others)	1s
PyTorch xformers CUDA tests	1s
Torch Pipelines CUDA Slow Tests	0s
	11s

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