Param argument accepts generic dict subtypes

[jcobb-healx]

closes: #29358

Allow subtypes of dict to be passed as the DAG and task params argument. This ensures that a ParamsDict object is a valid type for the argument value.

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[boring-cyborg]

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[msumit]

overall lgtm, though you've to add supported test cases for this. Also, could you ensure you've tested all paths touched by this change, like DAG trigger with config via UI/API/CLI, dag test cmd, etc.

[jcobb-healx]

I wasn't sure about a test case given this is a typing change, so mypy should catch any errors and there are no functional changes. But I can add a test to ensure that a ParamsDict object is a valid input to a DAG, which should catch typing regressions

[potiuk]

I wasn't sure about a test case given this is a typing change, so mypy should catch any errors and there are no functional changes. But I can add a test to ensure that a ParamsDict object is a valid input to a DAG, which should catch typing regressions

Yeah. I kinda agree that no tests are needed in this case.

[potiuk]

rebased to rebuild with latest main

[potiuk]

@msumit - wdyt?

[boring-cyborg]

Awesome work, congrats on your first merged pull request!