[Style] fix E721 warnings

[kashif]

What does this PR do?

Fix E721 Use is and is not for type comparisons and do not print config.hidden_size as a tuple.

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[Rocketknight1]

LGTM! ping me whenever you're finished and I'll merge (and try rerunning the tests or rebasing to get rid of those CI errors)

[kashif]

i am good!