Fix fullstack serialization order for adjacent components (#4600)

* fix serialization order

* add regression test

* split out test into a seperate package

* revert logging

* change order

* opinions on structure

* small wait in hydration order test

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

Cargo.toml

@@ -131,6 +131,7 @@ members = [
     "packages/playwright-tests/fullstack-errors",
     "packages/playwright-tests/fullstack-mounted",
     "packages/playwright-tests/fullstack-routing",
+    "packages/playwright-tests/fullstack-hydration-order",
     "packages/playwright-tests/suspense-carousel",
     "packages/playwright-tests/nested-suspense",
     "packages/playwright-tests/cli-optimization",