Add cudf snowflake example

[ncclementi]

Closes #494

With the caveat of having to do this:

from cudf.pandas.module_accelerator import disable_module_accelerator

with disable_module_accelerator():
    df = table.to_pandas()

import pandas as pd

df = pd.DataFrame(df)  # this will take a few seconds

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[jacobtomlinson]

I would use the docref admonition int he first paragraph to cross reference the Snowflake page. This has a few benefits including inserting a link back to this example at the bottom of the snowflake page.

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[jacobtomlinson]

Line #14.        "token": get_login_token(),

You could replace this line with "token": pathlib.Path("/snowflake/session/token").read_text() which would remove a little indirection while still being very readable.

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[jacobtomlinson]

I would make this note a warning admonition. We might also want to link to the issue so that readers can check on the progress.

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[jacobtomlinson]

Looks like ReviewNB had an issue and created some duplicated comments. I'll clean those up now.

[ncclementi]

We have an issue, I was trying to test the using Path to replace get_login_token() and now I can't seem to be able to establish a session. It just hangs in

session = Session.builder.configs(connection_parameters).create()

it's unclear to me why, I did turn of MFA just in case, I wonder if there is some token caching or something that might be causing a problem.

I will nuke everything and start from scratch tomorrow and see if things work. It's unclear what is going on.

[ncclementi]

I went through the deployment, and then connected and things worked. I'm not sure what was the hiccup yesterday but clean slate worked.

I updated the example according to @jacobtomlinson suggestions, and rebased against main to update the branch. This should be ready for final review.

[jacobtomlinson]

Awesome this looks great!