Add tree-sitter version of prog-fill-reindent-defun (bug#78703)

Add tree-sitter version of prog-fill-reindent-defun (bug#78703)

Add a tree-sitter version of prog-fill-reindent-defun that
indents the defun that encloses point, rather than the sibling
defun after point when there is one.

* lisp/progmodes/prog-mode.el:
(prog-fill-reindent-defun): Turns into a wrapper function.
(prog-fill-reindent-defun-function): New variable.
(prog-fill-reindent-defun-default): Old prog-fill-reindent-defun
becomes this function.
* lisp/treesit.el (treesit-fill-reindent-defun): New function.
(treesit-major-mode-setup): Setup
prog-fill-reindent-defun-function.

(cherry picked from commit f904ff5ca2535356e1353e5fc95d9b0643b8570b)