fix(paste): feed keys as typed in cmdline mode (#20959)

test/functional/api/vim_spec.lua

@@ -1108,6 +1108,14 @@ describe('API', function()
       nvim('paste', 'a', true, -1)
       eq('a', funcs.getcmdline())
     end)
+    it('pasted text is saved in cmdline history when <CR> comes from mapping #20957', function()
+      command('cnoremap <CR> <CR>')
+      feed(':')
+      nvim('paste', 'echo', true, -1)
+      eq('', funcs.histget(':'))
+      feed('<CR>')
+      eq('echo', funcs.histget(':'))
+    end)
     it('pasting with empty last chunk in Cmdline mode', function()
       local screen = Screen.new(20, 4)
       screen:attach()