feat(ssr): import.meta.filename/dirname support

[sapphi-red]

Description

import.meta.dirname and import.meta.filename are supported in Node 21.2+. We already support this in the Vite Runtime API.

vite/packages/vite/src/node/ssr/runtime/runtime.ts

Lines 348 to 349 in 738ecae

	filename: isWindows ? toWindowsPath(filename) : filename,
	dirname: isWindows ? toWindowsPath(dirname) : dirname,

It's still a release candidate. If there's a change in Node, I think we can change it in a minor.

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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• Read the Contributing Guidelines, especially the Pull Request Guidelines.
• 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).
• Update the corresponding documentation if needed.
• Ideally, include relevant tests that fail without this PR but pass with it.

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