testsuite, Darwin: Extend skipping of -g3 for more OS versions.

The dyld-based linker does not work with GCC's output for -g3 and that
is now in force from darwin23 onwards.

gcc/testsuite/ChangeLog:

	* gcc.dg/debug/dwarf2/dwarf2-macro.c: Skip for Darwin23+.
	* gcc.dg/debug/dwarf2/dwarf2-macro2.c: Likewise.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>