Upgrade test requirements to be compatible with python 3.12

[hgreebe]

Description of changes

• Add invoke to test requirements
  • Fixes this error: ModuleNotFoundError: No module named 'imp'
  • imp was removed in python 3.12, but the older version of invoke still tries to import it
• Upgrade fabric to >=3.2.2
  • fabric 2.6.0 requires invoke<2.0
  • 3.2.2 has the fix for the github issue commented
• Remove pytest.mark.usefixtures because it is a deprecated feature in python 3.12
• https://docs.pytest.org/en/stable/deprecations.html#applying-a-mark-to-a-fixture-function

Tests

• Ran integration test using a python 3.12 environment

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