Fix js--treesit-beginning/end-of-defun

Fix js--treesit-beginning/end-of-defun

* lisp/progmodes/js.el (require): Add rx.
(js--treesit-move-to-node): Remove function.
(js--treesit-beginning-of-defun)
(js--treesit-end-of-defun): Change to use treesit-search-forward-goto.
(js-treesit--defun-query): Remove variable.
(js--treesit-defun-type-regexp): Add variable.