vim-patch:9.0.2030: no max callback recursion limit (#25655)

Problem:  no max callback recursion limit
Solution: bail out, if max call recursion for callback functions
          has been reached.

This checks the 'maxfuncdepth' setting and throws E169 when a callback
function recursively calls itself.

closes: vim/vim#13337
closes: vim/vim#13339

47510f3d65

Co-authored-by: Christian Brabandt <cb@256bit.org>

src/nvim/options.lua

@@ -5154,6 +5154,7 @@ return {
         Increasing this limit above 200 also changes the maximum for Ex
         command recursion, see |E169|.
         See also |:function|.
+        Also used for maximum depth of callback functions.
       ]=],
       full_name = 'maxfuncdepth',
       scope = { 'global' },