[DesignProposal]: ensemble support schema

[zhujiming]

Background and Motivation

triton server support schema

Design

use new dag_info make ensemble config new dag_info add input_info output_info it most likely the picture.

Pros and Cons

No response

Anything else? (Additional Context)

No response

[zhujiming]

change input_info as a list of tuples

[stale[bot]]

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