[helm-charts] TGI parameters for Gaudi

[yongfengdu]

Current helm chart for TGI doesn't have much Gaudi specific parameters setting like:
OMPI_MCA_btl_vader_single_copy_mechanism: none
ENABLE_HPU_GRAPH: true
LIMIT_HPU_GRAPH: true
USE_FLASH_ATTENTION: true
FLASH_ATTENTION_RECOMPUTE: true
(https://github.com/opea-project/GenAIExamples/blob/main/VisualQnA/docker_compose/intel/hpu/gaudi/compose.yaml)
We need to evaluate the impact of the tei-gaudi parameters and have the optimized settings.
This could be part of a bigger scope of tuning/optimization.