Abstract ranger cache update list.

Abstract ranger cache update list.

Make it more efficient by removing the call to vec::contains.

	PR tree-optimization/102943
	* gimple-range-cache.cc (class update_list): New.
	(update_list::add): Replace add_to_update.
	(update_list::pop): New.
	(ranger_cache::ranger_cache): Adjust.
	(ranger_cache::~ranger_cache): Adjust.
	(ranger_cache::add_to_update): Delete.
	(ranger_cache::propagate_cache): Adjust to new class.
	(ranger_cache::propagate_updated_value): Ditto.
	(ranger_cache::fill_block_cache): Ditto.
	* gimple-range-cache.h (class ranger_cache): Adjust to update class.