Fix ipa-modref signature updates

Fix ipa-modref signature updates

	PR ipa/97586
	* ipa-modref-tree.h (modref_tree::remap_params): New member function.
	* ipa-modref.c (modref_summaries_lto::duplicate): Check that
	optimization summaries are not duplicated.
	(remap_arguments): Remove.
	(modref_transform): Rename to ...
	(update_signature): ... this one; handle also lto summary.
	(pass_ipa_modref::execute): Update signatures here rather
	than in transform hook.