Adding test cases for ea scenarios

[kishore881]

Open Issues

• test for policy command are failing with "<operation name? misspelled or unrecognized" error
• list role assignments' orderby query param unavailable in cli
• list role assignments pagination (only enabled via header or orderby param) unavailable via cli
• list departments test is failing due to issues in pagination token

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General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• My extension version conforms to the Extension version schema

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

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Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
You only need to update the version information in file setup.py and historical information in file HISTORY.rst in your PR but do not modify src/index.json.