[ci-auto] add milvus-multimodal backend to dataprep

[CICD-at-OPEA]

GenAIComps dataprep docker compose file got changed

Below files are changed in this commit

• comps/dataprep/deployment/docker_compose/compose.yaml

Please verify if the helm charts and manifests need to be changed accordingly.

This issue was created automatically by CI.

[CICD-at-OPEA]

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[poussa]

Not planned for v1.4