fix: handle try-catch for fs promise when resolve https config

[windsonR]

Description

Since PR: #12553, it use fsp to replace fs.

And, in http.ts, the try-catch can't catch promise's error.

This makes that when these config maybe not a actual path (such as @vitejs/plugin-basic-ssl), it will throw an error and try-catch can NOT catch this error then http server start fail.

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[bluwy]

Thanks for catching this!