[GSoC]Create LLM Hyperparameters Optimization API Proposal

[helenxie-bit]

What this PR does / why we need it: Give user functionality to tune HyperParameters of LLMs using simple Python SDK APIs

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #