Added the files for woq of codegen25 using ipex

[bbhattar]

Description

I am adding an example for deploying the code generation model with IPEX.
We use the IPEX Weight-only Quantization to convert the model to INT8 precision.

Files:

• README.md
• codegen_handler.py - custom handler for quantizing and deploying the model
• model-properties.yaml - config for model preparation
• benchmark.sh allows you to batch your inference requests
• sample_text_0.txt has a sample prompt you can use to test the code generation model.

Type of change

• New example (non-breaking change which adds functionality)

Feature/Issue validation/testing

Checklist:

• Did you have fun?
• Have you added tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

[min-jean-cho]

@lxning

[lxning]

it's better to set amp in model-config.yaml

[bbhattar]

Updated to enable amp from model-config.yaml

[lxning]

In TS, the initialize function is used to load model. Here, the benchmark is trying to run inference based on the sample input. TS supports customized metrics in backend to measure each stage latency during inference. So this section is not needed.

[bbhattar]

Removed benchmark and benchmark-related args.

[anupren]

Apache Benchmark data for this PR (codegen model) on Xeon hardware [2 sockets, 32 physical cores per socket]:

Model_Name	Benchmark	TS failed requests	TS throughput	TS latency P50	TS latency P90	TS latency P99	TS latency mean	TS error rate	Batch size	Batch delay	Workers	Concurrency	Input	Requests	Model_p50	Model_p90	Model_p99	Queue time p50	Queue time p90	Queue time p99	predict_mean	handler_time_mean	waiting_time_mean	worker_thread_mean
Codegen25	AB	0	0.2	4987	5151	5151	4987.605	0	1	200	1	1	ipex_woq/sample_text_0.txt	10	4928.27	4958.85	4958.85	0	0	0	4984.41	4984.23	0	1.2
Codegen25	AB	0	0.36	5261	5410	5514	5535.294	0	2	200	1	2	ipex_woq/sample_text_0.txt	40	5221.29	5248.67	5248.67	0	1	100	5256.64	5256.45	5.2	2.24
Codegen25	AB	0	0.63	5757	6152	6154	6379.648	0	4	200	1	4	ipex_woq/sample_text_0.txt	40	5738.32	5743.07	5743.07	1	99	100	5773.37	5773.18	10.78	3.55