[low-code connectors] set default paginator

[girarda]

What

• Set paginator to NoPagination if paginator is None

How

• Set paginator to NoPagination if paginator is None

Recommended reading order

1. airbyte-cdk/python/airbyte_cdk/sources/declarative/retrievers/simple_retriever.py

🚨 User Impact 🚨

Are there any breaking changes? What is the end result perceived by the user? If yes, please merge this PR with the 🚨🚨 emoji so changelog authors can further highlight this if needed.

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