Disable '@typescript-eslint/prefer-readonly' (#3127)

Author: IvanGoncharov

.eslintrc.yml

@@ -574,7 +574,7 @@ overrides:
       '@typescript-eslint/prefer-namespace-keyword': error
       '@typescript-eslint/prefer-nullish-coalescing': error
       '@typescript-eslint/prefer-optional-chain': error
-      '@typescript-eslint/prefer-readonly': error
+      '@typescript-eslint/prefer-readonly': off
       '@typescript-eslint/prefer-readonly-parameter-types': off # TODO consider
       '@typescript-eslint/prefer-reduce-type-parameter': error
       '@typescript-eslint/prefer-regexp-exec': off