feat: Update Triton model support

[rafvasq]

Motivation

Triton introduced support for more model frameworks last year and can support xgboost, lightgbm, and more. This PR adds examples and docs to advertise this.

Modifications

• Add newly supported models to Triton runtime config, setting autoSelect: false.
• Add an example ISVC config for Triton-served XGBoost model.
• Update example-models doc to reflect example models added in https://github.com/kserve/modelmesh-minio-examples/pull/7
• Update model-formats README to reflect framework support and framework-specific docs to show example ISVC using Triton.
• Add FVTs for lightgbm and xgboost deployment on Triton runtime

Result

Closes #185

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This pull-request has been approved by: ckadner, rafvasq

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[oss-prow-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ckadner, rafvasq

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kserve/modelmesh-serving/blob/main/OWNERS)~~ [ckadner,rafvasq] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment