fix(scope-manager): handle index signature in class

[yeonjuan]

PR Checklist

• Addresses an existing open issue: fixes Bug: no-undef reports on class index signature #9053
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

[typescript-eslint]

Thanks for the PR, @yeonjuan!

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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✅ Successfully ran 31 targets

• nx test eslint-plugin --coverage=false
• nx test eslint-plugin
• nx test typescript-estree --coverage=false
• nx test utils --coverage=false
• nx test visitor-keys --coverage=false
• nx test typescript-eslint --coverage=false
• nx run types:build
• nx test repo-tools --coverage=false
• nx test scope-manager --coverage=false
• nx test type-utils --coverage=false
• nx run repo-tools:postinstall-script
• nx test rule-schema-to-typescript-types --coverage=false
• nx test parser --coverage=false
• nx test eslint-plugin-internal --coverage=false
• nx run-many --target=lint --parallel --exclude eslint-plugin
• nx test type-utils
• nx test visitor-keys
• nx test eslint-plugin-internal
• nx test utils
• nx test scope-manager
• nx test typescript-eslint
• nx test rule-schema-to-typescript-types
• nx test repo-tools
• nx test parser
• nx test typescript-estree
• nx test ast-spec
• nx test ast-spec --coverage=false
• nx run-many --target=build --parallel --exclude=website --exclude=website-eslint
• nx run-many --target=typecheck --parallel
• nx run integration-tests:test
• nx run repo-tools:generate-configs

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[JoshuaKGoldberg]

💯 thanks!

[Josh-Cena]

Just requesting more tests. Code looks good to me

[yeonjuan]

@Josh-Cena Thanks! I added more tests.

[JoshuaKGoldberg]