Auto merge of #103205 - spastorino:fix-rpits-lifetime-remapping, r=cjgillot

Do anonymous lifetimes remapping correctly for nested rpits

Closes #103141

r? `@cjgillot` `@nikomatsakis`

This fixes a stable to stable regression that in my opinion is `P-critical` so, we probably want to backport it all the way up to stable.

src/test/ui/impl-trait/nested-rpit-with-anonymous-lifetimes.rs

@@ -0,0 +1,23 @@
+// check-pass
+
+pub struct VecNumber<'s> {
+    pub vec_number: Vec<Number<'s>>,
+    pub auxiliary_object: &'s Vec<usize>,
+}
+
+pub struct Number<'s> {
+    pub number: &'s usize,
+}
+
+impl<'s> VecNumber<'s> {
+    pub fn vec_number_iterable_per_item_in_auxiliary_object(
+        &self,
+    ) -> impl Iterator<Item = (&'s usize, impl Iterator<Item = &Number<'s>>)> {
+        self.auxiliary_object.iter().map(move |n| {
+            let iter_number = self.vec_number.iter();
+            (n, iter_number)
+        })
+    }
+}
+
+fn main() {}