fix order of reverse topologic iteration (#6728)

### Description

the ordering of reverse topological was incorrect. When pushing to the
stack we need to push items in reverse order to make sure they are
popped in correct order again.


Closes PACK-2116

crates/turbo-tasks/src/graph/adjacency_map.rs

@@ -81,6 +81,7 @@ where
             stack: self
                 .roots
                 .into_iter()
+                .rev()
                 .map(|root| (ReverseTopologicalPass::Pre, root))
                 .collect(),
             visited: HashSet::new(),
@@ -95,6 +96,7 @@ where
             stack: self
                 .roots
                 .iter()
+                .rev()
                 .map(|root| (ReverseTopologicalPass::Pre, root))
                 .collect(),
             visited: HashSet::new(),
@@ -161,6 +163,7 @@ where
                     self.stack.extend(
                         neighbors
                             .iter()
+                            .rev()
                             .map(|neighbor| (ReverseTopologicalPass::Pre, neighbor.clone())),
                     );
                 }
@@ -211,6 +214,7 @@ where
                     self.stack.extend(
                         neighbors
                             .iter()
+                            .rev()
                             .map(|neighbor| (ReverseTopologicalPass::Pre, neighbor)),
                     );
                 }