Add stress test (#3222)

Created a simple echo TCP server that on two different runtimes that is
called from a GitHub action using Valgrind to ensure that there are
no memory leaks.

Fixes: #3022

Cargo.toml

@@ -9,6 +9,7 @@ members = [
   # Internal
   "benches",
   "examples",
+  "stress-test",
   "tests-build",
   "tests-integration",
 ]