feat: add tiflow engine image artifact

[jayl1e]

No description provided.

[ti-chi-bot]

I have already done a preliminary review for you, and I hope to help you do a better job.
The pull request adds a new container image artifact for the tiflow engine. The change includes adding the necessary configuration in the packages.yaml.tmpl file.

Potential problems:

• The PR description is empty, which makes it difficult to understand the purpose of the PR and its context.
• It is not clear why the GOPROXY environment variable is set to multiple values. It might cause issues if the build process tries to resolve dependencies from different sources.

Suggestions:

• The PR description should provide a brief summary of the changes and why they are necessary.
• It would be helpful to include some information about the tiflow engine and its purpose.
• The GOPROXY environment variable should be set to a single value to avoid any issues.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wuhuizuo

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• OWNERS [wuhuizuo]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-01-25 11:29:28.885539316 +0000 UTC m=+1046610.449837021: ☑️ agreed by wuhuizuo.

[wuhuizuo]

/hold

[jayl1e]

/unhold