tools,test,lib: enable no-cond-assign ESLint rule
no-cond-assign is one of the few ESLint recommended rules that we have turned off. This change enables the rule.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
no-cond-assign is one of the few ESLint recommended rules that we have turned off. This change enables the rule.