fix: only warn in tests for rxjs/no-ignored-subscription

There is generally smaller risk in tests and we don't have good patterns established.

.eslintrc.js

@@ -305,6 +305,7 @@ module.exports = {
         'react/jsx-no-bind': 'off',
         '@typescript-eslint/explicit-function-return-type': 'off',
         'react/button-has-type': 'off',
+        'rxjs/no-ignored-subscription': 'warn',
       },
     },
     {