fix: close API does not actually close the build

[9aoy]

Summary

The build is not actually closed when close() is called, only watcher was closed before.

Related Links

https://github.com/web-infra-dev/rspack/blob/8f75992e608d0e317ce94078f1b830d2d44121e6/packages/rspack/src/Compiler.ts#L646

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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