File.zip_file: don't load contents into memory while zipping, support custom password

[psrok1]

Draft notes
It would be even better to iterate that zip on the fly, so we're not waiting until everything is ready to ship but I don't know yet how to do that 🤔

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• I've tested my changes by building and running the project, and testing changed functionality (if applicable)
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What is the current behaviour?

What is the new behaviour?

Test plan

Closing issues

closes #1092

[yankovs]

can lower memory footprint here I think:

if self.upload_stream is not None:
    self.upload_stream.seek(0)
    for chunk in iter(lambda: self.upload_stream.read(chunk_size), b""):
        zipf.write(chunk)
else:
    with self.open() as fsrc:
        for chunk in iter(lambda: fsrc.read(chunk_size), b""):
            zipf.write(chunk)

[yankovs]

what do you mean by "on the fly"?