Add automated postflight check code into install folder.

[LiuYuWei]

PR checklist

• [x] Ensure you have added or ran the appropriate tests for your PR.
• [x] DCO signed

What type of PR is this?

feature.

What this PR does / why we need it:

Do the postflight check automatically.

Which issue(s) this PR fixes:

sc-24603

Special notes for your reviewer:

Please see the README file first to know how to use this code.

Does this PR introduce a user-facing change?:

- Build up auto post-flight check method.