[Task]: Rewrite Python MongoDB Performance Test

### What needs to happen?

Currently we have a Python Mongo DB load test job: https://ci-beam.apache.org/job/beam_python_mongoio_load_test but it is not reporting metrics and merely useful. Following test framework: https://docs.google.com/document/d/14GatBilwuR4jJGb-ZNpYeuB-KkVmDvEm/edit#heading=h.gjdgxs this test needed to be rewritten.

### Issue Priority

Priority: 3 (nice-to-have improvement)

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