Update and simplify CodeTrans tutorials

[alexsin368]

• Remove steps to build images: just use docker compose to pull images instead
• Add steps for running with vLLM and TGI
• Update steps to validate microservices
• Update steps for port forwarding and changing BACKEND_SERVICE_IP for UI to work
• Fix grammar and improve wording

[Copilot]

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

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• tutorial/CodeTrans/CodeTrans_Guide.rst: Language not supported

Comments suppressed due to low confidence (1)

tutorial/CodeTrans/deploy/gaudi.md:95

• The start command for the Gaudi deployment uses the 'intel/cpu/xeon' directory path, while the stop command later refers to 'intel/hpu/gaudi'. Please review and correct the directory path to ensure consistency for the Gaudi environment.

cd $WORKSPACE/GenAIExamples/CodeTrans/docker_compose/intel/cpu/xeon

[yinghu5]

LGTM, thank you!

[mkbhanda]

Minor comments.

[alexsin368]

addressed all comments

[ashahba]

LGTM!