CodeTrans README improvements

[mkbhanda]

In https://github.com/opea-project/GenAIExamples/blob/main/CodeTrans/README.md

1. Please generalize the architecture diagram to
   a) replace TGI with Model-server (TGI or vLLM or other)
   b) Instead of mentioning Xeon for CPU or Gaudi, leave it as hardware
   Xeon => CPU or other Hardware
   Gaudi => GPU( AMD ROCm, Intel Arc, Nvidia) or accelerator (Intel Gaudi)
   Basically list options
2. Tracing and Monitoring points to README miscellaneous that has no mention of logging/tracing/. There must be a common README for set up and using Otelemetry, prometheus, graphana etc in ChatQnA. Re-use.
3. Can even remove reference to GMC

[letonghan]

Thanks @mkbhanda for the detailed instruction. The PR link will be updated here when proposed.

[letonghan]

Hi @mkbhanda , refine PR: #1960, please review