vim-patch:9.1.0990: Inconsistent behavior when changing cmdheight (#31830)

Problem:  Inconsistent behavior when changing cmdheight by resizing the
          topframe through wincmds and dragging laststatus. Changing
          cmdheight by resizing the topframe does not trigger OptionSet.
Solution: Consolidate logic for changing the cmdheight, set the option
          value to handle side-effects (Luuk van Baal)

e15cbc1af4

vim-patch:9.0.0187: command line height changes when maximizing window height

Problem:  Command line height changes when maximizing window height.
Solution: Do not change the command line height. (closes vim/vim#10885)

96bde99bf8

test/old/testdir/test_window_cmd.vim

@@ -56,7 +56,6 @@ func Test_window_cmd_cmdwin_with_vsp()
 endfunc
 
 func Test_cmdheight_not_changed()
-  throw 'Skipped: N/A'
   set cmdheight=2
   set winminheight=0
   augroup Maximize