Support KServe inference service

[Syulin7]

Support KServe inference service:

usage:

arena serve kserve \
--name=sklearn-iris \
--version=alpha \
--model-format=sklearn \
--port=8080 \
--min-replicas=2 \
--max-replicas=10 \
--storage-uri=gs://kfserving-examples/models/sklearn/1.0/model

[cr-gpt]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[cr-gpt]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[cr-gpt]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[cheyang]

/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cheyang, Syulin7

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