refactor(llm): use litellm params for reasoning support #8529

Job	Run time
build-binary-and-test (ubuntu-latest)	2m 33s
Check OpenAPI Schema	34s
build-binary-and-test (macos-latest)	2m 34s
Build & Push (python-amd64)	7m 12s
Build & Push (java-amd64)	8m 53s
Build & Push (python-arm64)	7m 27s
Build & Push (java-arm64)	6m 19s
Build & Push (golang-amd64)	5m 52s
Build & Push (golang-arm64)	6m 44s
Merge Multi-Arch Manifests (python)	15s
Merge Multi-Arch Manifests (java)	19s
Merge Multi-Arch Manifests (golang)	20s
Consolidate Build Information	5s
Update PR description with agent server image	4s
	49m 11s

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