Limit recursion level for tree-sitter imenu functions

Limit recursion level for tree-sitter imenu functions

Generating imenu index doesn't require going down to the bottom of the
tree (defun's are usually top-level).  Add limit so we don't go too
far down on very large buffers.

* lisp/progmodes/c-ts-mode.el (c-ts-mode--imenu)
* lisp/progmodes/java-ts-mode.el (java-ts-mode--imenu)
* lisp/progmodes/js.el (js--treesit-imenu)
* lisp/progmodes/json-ts-mode.el (json-ts-mode--imenu)
* lisp/progmodes/python.el (python-imenu-treesit-create-index)
* lisp/textmodes/css-mode.el (css--treesit-imenu): Add limit to
treesit-induce-sparse-tree.