[Modular] implement requirements validation for custom blocks #36952

Job	Run time
check_code_quality	31s
check_repository_consistency	31s
LoRA tests with PEFT main	7m 0s
Fast PyTorch Models & Schedulers CPU tests	7m 2s
Fast PyTorch Pipeline CPU tests	16m 2s
PyTorch Example CPU tests	17m 48s
Hub tests for models, schedulers, and pipelines	1m 50s
	50m 44s

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