fix(config): don't resolve by module field

[sapphi-red]

Description

rollup plugins declares module field.
https://github.com/rollup/plugins/blob/4e85ed78cd2e941107fdf0e8e118e7bee550109d/packages/yaml/package.json#L17

But this field could resolve to .js files and this cannot be externalized because it will be treated as CJS by node.

This PR changes mainFields to be [] so that module field won't be used when a module is externalized.

reproduction

related: #10254

Additional context

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• 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.

[gb-jos]

@patak-dev just noticed this with 3.2.0-beta.0, for me failing with @rollup/plugin-inject, would it be possible to have a 3.2.0-beta.1 release with this fix ?