[docs] deprecate pipelines #36786

Job	Run time
check_code_quality	38s
check_repository_consistency	28s
LoRA tests with PEFT main	5m 53s
PyTorch Example CPU tests	16m 28s
Fast PyTorch Pipeline CPU tests	14m 34s
Fast PyTorch Models & Schedulers CPU tests	6m 11s
Hub tests for models, schedulers, and pipelines	1m 31s
	45m 43s

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