explore,catalog-graph: use entityRouteRef directly

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/cyan-rice-grab.md

@@ -0,0 +1,13 @@
+---
+'@backstage/plugin-catalog-graph': patch
+---
+
+Deprecated the external `catalogEntity` route as this is now imported directly from `@backstage/plugin-catalog-react` instead.
+
+This means you can remove the route binding from your `App.tsx`:
+
+```diff
+-    bind(catalogGraphPlugin.externalRoutes, {
+-      catalogEntity: catalogPlugin.routes.catalogEntity,
+-    });
+```

.changeset/large-flowers-fetch.md

@@ -0,0 +1,13 @@
+---
+'@backstage/plugin-explore': patch
+---
+
+Deprecated the external `catalogEntity` route as this is now imported directly from `@backstage/plugin-catalog-react` instead.
+
+This means you can remove the route binding from your `App.tsx`:
+
+```diff
+-    bind(explorePlugin.externalRoutes, {
+-      catalogEntity: catalogPlugin.routes.catalogEntity,
+-    });
+```