Support wrapping `evil-execute-in-god-state'.

[fishyfriend]

This PR makes it possible to wrap evil-execute-in-god-state in another command.

God state's post-command hook checks the name of the last-run command to know whether to exit the state. If I wrap evil-execute-in-god-state inside another command, the last-run command is no longer evil-execute-in-god-state, but rather the name of the command that wraps it. This would break the check as it currently exists. So I have simply updated evil-execute-in-god-state to set the name of the current command in a variable. The check now looks at this variable instead of hardcoding the command name.

I am currently using this feature to make normal-mode keybindings usable via God state. So I can have , bound to regular evil-execute-in-god-state and ' bound to this:

(defun evil-execute-in-god-state-with-evil-bindings ()
  (interactive)
  ;; evil-god-set-transient-bindings sets up an Evil intercept keymap
  ;; that makes the specified keybindings available in god state.
  ;; elsewhere i ensure the intercept map is cleaned up after leaving the state.
  (evil-god-set-transient-bindings
   (make-composed-keymap (current-active-maps)))
  (evil-execute-in-god-state))

Happy to share the full code for the above but it's dirty so not posting for the moment. Perhaps will make another PR for it later.