fix: `build.modulePreload.resolveDependencies` is optimizable

[sapphi-red]

Description

The document of build.modulePreload.resolveDependencies had

Returning a relative path to the hostId for hostType === 'js' is allowed, in which case new URL(dep, import.meta.url) is used to get an absolute path when injecting this module preload in the HTML head.

, but actually this wasn't true. build.modulePreload.resolveDependencies does not expect a relative path to the hostId. It expects a relative path to build.outDir. The result of build.modulePreload.resolveDependencies is passed to toOutputFilePathWithoutRuntime or toOutputFilePathInJS.

close #13169 (indirectly)

Additional context

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What is the purpose of this pull request?

• [x] Bug fix
• [ ] New Feature
• [ ] Documentation update
• [ ] Other

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