Fix the event handler memory leak (#3508)

* Fix the event handler memory leak

* Add a regression test for memory leaks

* add a component to the memory leak test

packages/core/Cargo.toml

@@ -34,6 +34,7 @@ reqwest = { workspace = true }
 tracing-subscriber = { workspace = true, default-features = true }
 tracing-fluent-assertions = "0.3.0"
 pretty_assertions = "1.3.0"
+sysinfo = "0.33.1"
 
 [dev-dependencies.web-sys]
 version = "0.3.56"