Updating DWIN menus to Marlin language_xx.h strings using GET_TEXT_F

[CRCinAU]

This is a first-run at converting a menu within the DWIN system to use strings instead of copying parts of a JPG file between areas of the screen.

This allows us to start using the marlin language_XX.h files to localise menu items.

While this can be merged, I'm submitting for feedback as if this is the preferable way to do this before I take on more of the menus.

Feedback is welcome.

[CRCinAU]

This is probably as complete as I can go right now without doing full structural changes to menus that seem to be unnecessarily complex.

ie the Prepare menu. That will be much more invasive than these.

[thinkyhead]

The screens in dwin.cpp do need to be maintained because we don't have a viable way to get Chinese on this display using the current methodology, and it matches the branded interface of the Ender-3 V2.

However, the next effort for this display is to implement all the necessary MarlinUI methods so it can display the full menu tree, edit screens, and the rest.

There are some extra challenges because this display is persistent and can scroll its contents and do other tricks, so the typical screen update loop probably won't be applicable. But a crude "erase-and-redraw-everything" method could be developed pretty rapidly at first and then the screen update methods can be optimized from there.

I'm going to work on a first implementation of MarlinUI for this display over the weekend and should soon have something semi-working.