fix(eslint-plugin): [no-restricted-imports] prevent crash when patterns or paths in options are empty

[auvred]

PR Checklist

• Addresses an existing open issue: fixes Bug: no-restricted-imports crashes when paths & patterns are both empty, but defined #8103
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

Thanks to @mdziekon for investigation made in #8103!

Basically the extension rule didn't check if the base rule returned listeners or not (its typing was wrong, base rule may return empty object https://github.com/eslint/eslint/blob/5aa9c499da48b2d3187270d5d8ece71ad7521f56/lib/rules/no-restricted-imports.js#L192-L195)

[typescript-eslint]

Thanks for the PR, @auvred!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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[JoshuaKGoldberg]

👍 thanks!