fix(types): correct typing ParserOptions

[nix6839]

PR Checklist

• Addresses an existing open issue: fixes Bug: incompatible type ParserOptions['projectFolderIgnoreList'] #8853
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

I updated the type and refactored the code to prevent the same situation from happening again.

[typescript-eslint]

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✅ Successfully ran 31 targets

• nx test eslint-plugin --coverage=false
• nx test eslint-plugin
• nx test type-utils --coverage=false
• nx test utils --coverage=false
• nx test typescript-estree --coverage=false
• nx run types:build
• nx test visitor-keys --coverage=false
• nx test typescript-eslint --coverage=false
• nx test scope-manager --coverage=false
• nx run repo-tools:postinstall-script
• nx test rule-schema-to-typescript-types --coverage=false
• nx test repo-tools --coverage=false
• nx test eslint-plugin-internal --coverage=false
• nx test parser --coverage=false
• nx run-many --target=lint --parallel --exclude eslint-plugin
• nx test typescript-estree
• nx test utils
• nx test visitor-keys
• nx test type-utils
• nx test scope-manager
• nx test typescript-eslint
• nx test eslint-plugin-internal
• nx test parser
• nx test rule-schema-to-typescript-types
• nx test repo-tools
• 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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[Josh-Cena]

👍

[JoshuaKGoldberg]

Yes! Love sugaring up from an Object.assign to a .... Thanks! 🙌