fix: ignore tsconfig target when bundling config

[sapphi-red]

Description

When target: es5 is set in tsconfig.json and vite.config.ts exists, Vite fails to start.
This is because esbuild looks for that when bundling config.

Because we always ignore target in tsconfig.json and users won't expect target field to be respected for config loading, I think it is better to ignore target field here too.

reproduction: https://stackblitz.com/edit/vitejs-vite-h1gxde?file=vite.config.ts&terminal=dev

Additional context

related discussion: #3827

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[htmnk]

@sapphi-red @bluwy This seems to be broken again,

works when I downgrade to 3.0.9 on your repro link

https://stackblitz.com/edit/vitejs-vite-h1gxde?file=package.json&terminal=dev

doesn't work with 3.1.0+

[patak-dev]

@htmnk would you create a new issue with a reproduction against latest so we can properly track the regression? Thanks!