impv: Add raise error test for convert_params

[zhongjiajie]

Brief Summary of The Change

Add error type test for convert_params function

Pull Request checklist

I confirm that the following checklist has been completed.

• [x] Add/Change test cases for the changes.
• [x] Add/Change the related documentation, should also change docs/source/config.rst when you change file default_config.yaml.
• [ ] (Optional) Add your change to UPDATING.md when it is an incompatible change.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.90%. Comparing base (f16599f) to head (ec55c52). Report is 9 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #131 +/- ## ========================================== + Coverage 90.86% 90.90% +0.04% ========================================== Files 64 64 Lines 2354 2354 ========================================== + Hits 2139 2140 +1 + Misses 215 214 -1 ``` | [Flag](https://app.codecov.io/gh/apache/dolphinscheduler-sdk-python/pull/131/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/apache/dolphinscheduler-sdk-python/pull/131/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache) | `90.90% <100.00%> (+0.04%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apache#carryforward-flags-in-the-pull-request-comment) to find out more.

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