Add modular SA-ASR recipe for M2MeT2.0 (#831)

yhliang

2023-08-10 08ee9e6aacc2e306211d393f6e8ce3a7f3620102

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from abc import ABC
from abc import abstractmethod
from typing import Iterator
 
 
class AbsIterFactory(ABC):
    @abstractmethod
    def build_iter(self, epoch: int, shuffle: bool = None) -> Iterator:
        raise NotImplementedError