E0396 new error format

[clementmiao]

Updated E0396 to new error format.
Part of #35233
Fixes#35694

Thanks again for letting me help!

r? @jonathandturner

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @jonathandturner (or someone else) soon.

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[clementmiao]

please ignore, contains 2 commits, one of them unrelated. going to make a pull request from a different branch.