Assert early error for private names in method definitions

...inition/private-name-early-error-async-fn-inside-class.js

...ct/method-definition/private-name-early-error-async-fn.js

...nition/private-name-early-error-async-gen-inside-class.js

...t/method-definition/private-name-early-error-async-gen.js

...d-definition/private-name-early-error-gen-inside-class.js

.../object/method-definition/private-name-early-error-gen.js

...ition/private-name-early-error-get-method-inside-class.js

.../method-definition/private-name-early-error-get-method.js

...efinition/private-name-early-error-method-inside-class.js

...ject/method-definition/private-name-early-error-method.js

...ition/private-name-early-error-set-method-inside-class.js

.../method-definition/private-name-early-error-set-method.js