SqlToS3Operator: feat/ add max_rows_per_file parameter

[selimchergui]

Description
SqlToS3Operator create an S3 object from the output of a sql qurey. Unless you specify a groupby_kwargs parameter, the entire data will be written in one object. This could results on data pipeline issues especially when output files are consumed by limited resources workers (like Kubernetes pods).
So I suggest adding a new paramter, max_rows_per_file, to limit the size of destination files and dispatch output data into multiple files.

Use case/motivation
I faced a lot of out-of-memory issues when trying to process SqlToS3Operator destination object. With such a feature, output will be standardized and next compute worker can easily has an adequate size and a predictable run time.

Code of Conduct
I agree to follow this project's Code of Conduct

[boring-cyborg]

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[potiuk]

LGTM

[potiuk]

I reverse-quoted a grouby_keywords as spellchecking did not like it, hopefully it will get green and I will be able to merge it

[syedahsn]

Now that you explicitly fail if both parameters are specified, you could potentially simplify this statement:
if self.max_rows_per_file and not self.groupby_kwargs:
But I'll leave that up to you :)

[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.

[potiuk]

Now that you explicitly fail if both parameters are specified, you could potentially simplify this statement: if self.max_rows_per_file and not self.groupby_kwargs: But I'll leave that up to you :)

Yeah. Thought about that too, but now it is very explicit as well.