Remove autouse from fixtures

[kiendang]

Description

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Affected Dependencies

Remove autouse=True from fixtures. Looks like none of the fixtures we have actually benefit from autouse and it only slows down the tests. autouse=True is usually only used for side effects, not fixtures that return a value. Also putting autouse=True on fixtures with no dependencies (fixtures that take no arguments) applies that fixtures to every single test in the test suite, a lot of which do not require the fixture at all, slowing down these tests tremendously.

How has this been tested?

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Checklist

• I have followed the Contribution Guidelines and Code of Conduct
• I have commented my code following the OpenMined Styleguide
• I have labeled this PR with the relevant Type labels
• My changes are covered by tests