[ao] Added function to inform dynamic vs static appropriate
Summary: The _detect_dynamic_vs_static function was added to take in a
prepared fx graph model that already had ModelReportObservers built into
it and uses the collected information to determine whether input and
output are stationary or non-stationary and provides feedback on whether
to make linear modules static or dynamic based on this information.
This PR will be followed up soon with another PR that will more
rigoursly test the whole end to end performance of this system, which is
primarily how the function in this PR will be tested for functionality,
which is why this one only has 1 test.
Test Plan: python test/quantization/fx/test_model_report_fx.py TestModelReportDetectDynamicStatic
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Pull Request resolved: https://github.com/pytorch/pytorch/pull/79326
Approved by: https://github.com/HDCharles
