chore(website): fixed most no-unnecessary-condition complaints#7836

JoshuaKGoldberg merged 5 commits intotypescript-eslint:maintypescript-eslint/typescript-eslint:mainfrom

JoshuaKGoldberg:lint-enable-no-unnecessary-condition-websiteJoshuaKGoldberg/typescript-eslint:lint-enable-no-unnecessary-condition-websiteCopy head branch name to clipboard