build: upgrade to C++23

Meson 1.1.1 and GCC-13 both support C++23 and a sufficient portion of
the standard has been implemented.  Upgrade the build to leverage it.

Change-Id: I3d0bba58b46d3744ad17e4491f94a6a626a4402a
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
1 file changed