vim-patch:8.1.2263: 'noesckeys' test fails in GUI

Problem:    'noesckeys' test fails in GUI.
Solution:   Skip the test in the GUI.
215ba3b636

Cherry-pick "CheckNotGui" command from patch 8.1.1826.

src/nvim/testdir/check.vim

@@ -65,3 +65,11 @@ func CheckCanRunGui()
     throw 'Skipped: cannot start the GUI'
   endif
 endfunc
+
+" Command to check that not currently using the GUI
+command CheckNotGui call CheckNotGui()
+func CheckNotGui()
+  if has('gui_running')
+    throw 'Skipped: only works in the terminal'
+  endif
+endfunc

src/nvim/testdir/test_edit.vim

@@ -1,9 +1,11 @@
 " Test for edit functions
-"
+
 if exists("+t_kD")
   let &t_kD="[3;*~"
 endif
 
+source check.vim
+
 " Needed for testing basic rightleft: Test_edit_rightleft
 source view_util.vim
 
@@ -1516,6 +1518,7 @@ func Test_edit_startinsert()
 endfunc
 
 func Test_edit_noesckeys()
+  CheckNotGui
   new
 
   " <Left> moves cursor when 'esckeys' is set