Remove gimple_expr_type uses from value-range code

Remove gimple_expr_type uses from value-range code

This removes the last uses from value-range code.

2021-07-16  Richard Biener  <rguenther@suse.de>

	* tree-vrp.c (register_edge_assert_for_2): Use the
	type from the LHS.
	(vrp_folder::fold_predicate_in): Likewise.
	* vr-values.c (gimple_assign_nonzero_p): Likewise.
	(vr_values::extract_range_from_comparison): Likewise.
	(vr_values::extract_range_from_ubsan_builtin): Use the
	type of the first operand.
	(vr_values::extract_range_basic): Push down type
	computation, use the appropriate LHS.
	(vr_values::extract_range_from_assignment): Use the
	type of the LHS.