Provide (possibly stub) R 4.2 device callbacks (so as to stop R freezes/crashes)

[trevorld]

• This is a refinement of svglite does not work with saving a plot made with {ggblend} #184 and @teunbrand's comment new graphics engine features #174 (comment) about trying to use R 4.2 features in {svglite} and observing freezes/crashes to their R systems
• This is different from new graphics engine features #174 in that this issue can be resolved by providing stubs that do nothing instead of actually supporting the new graphics features (although the latter would be great!)
• When closing enhanced 'dev.capabilities()' support #152 (thanks!) I think deviceVersion was set to 15 (in order to support the capabilities() device callback) and thus I speculate that is why R expects that the these callbacks exist and these crashes are occurring because they don't. I speculate that if these device callbacks were provided (even if just stubs that did nothing) these crashes may stop occurring.
• According to updating graphics devices to R 4.2 by Paul Murrell:

The new graphics engine version requires that the graphics device provides the following new device callbacks:

• defineGroup()
• useGroup()
• releaseGroup()
• stroke()
• fill()
• fillStroke()
• capabilities()

In each case, it is possible to provide a stub that does nothing. The graphics engine will call the device, but there will just be no output produced.

The postscript() graphics device provides a template for this approach. A graphics device package can model its device callbacks on functions like PS_defineGroup() in devPS.c.