Add optimizer_config to replace original parameters

[donglihe-hub]

What does this PR do?

put optimizer parameters into a single dictionary while keeping the yaml file unchanged.

Test CLI & API (bash tests/autotest.sh)

Test APIs used by main.py.

• [ ] Test Pass
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Check API Document

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• [ ] API document is updated (linear, nn)
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Test quickstart & API (bash tests/docs/test_changed_document.sh)

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