gccrs: reuse destructure code in compilation of types

gccrs: reuse destructure code in compilation of types

We can just return error_mark_node instead of our own custom
recursion limit checker code. This makes the backend more reuseable
in error states.

gcc/rust/ChangeLog:

	* backend/rust-compile-type.cc (TyTyResolveCompile::TyTyResolveCompile): call destructure
	(TyTyResolveCompile::compile): use error_mark_node
	(TyTyResolveCompile::visit): use error_mark_node
	* backend/rust-compile-type.h: remove recursive ops

Signed-off-by: Philip Herron <herron.philip@googlemail.com>