⚡️ Speed up method `AutoencoderKLWan.clear_cache` by 886% #31400

Job	Run time
check_code_quality	32s
check_repository_consistency	27s
Fast PyTorch Pipeline CPU tests	10m 28s
Fast PyTorch Models & Schedulers CPU tests	5m 6s
Hub tests for models, schedulers, and pipelines	2m 30s
Fast Flax CPU tests	3m 22s
LoRA tests with PEFT main	6m 11s
PyTorch Example CPU tests	9m 3s
	37m 39s

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