fix(devtools): recurse correctly when finding hydration error nodes

findErrorNodesForHydrationOverlay recursed into
findNodesForHydrationOverlay, which stops descending at the first node
with any hydration status. Mismatched nodes nested under a hydrated or
skipped node were therefore never found and never highlighted on the
page. Recurse into the error-node finder itself so nested mismatches
are highlighted.

Author: AleksanderBodurri

devtools/projects/ng-devtools-backend/src/lib/hydration/hydration-overlays.ts

@@ -138,7 +138,7 @@ function findErrorNodesForHydrationOverlay(
       return {node: node.nativeElement!, status: node.hydration};
     }
     if (node.children.length) {
-      return findNodesForHydrationOverlay(node.children);
+      return findErrorNodesForHydrationOverlay(node.children);
     }
     return [];
   });