No tracing of nop traceable fields (#29926)

* Add `no_trace` option to JSTraceable derive

* NoTrace wrapper

* Port some types to no_trace schematics

* Fixing my unsafe mistakes (not tracing traceables)

* Add docs & safety guards for no_trace

Safety guards (trait shenanigans) guarantees safety usage of `no_trace`

* Port canvas_traits to no_trace

* Port servo_media to no_trace

* Port net_traits to no_trace

* Port style to no_trace

* Port webgpu to no_trace

* Port script_traits to no_trace

* Port canvas_traits, devtools_traits, embedder_traits, profile_traits to no_trace

* unrooted_must_root lint in seperate file

* Add trace_in_no_trace_lint as script_plugin

* Composable types in must_not_have_traceable

* Introduced HashMapTracedValues wrapper

* `HashMap<NoTrace<K>,V>`->`HashMapTracedValues<K,V>`

* Port rest of servo's types to no_trace

* Port html5ever, euclid, mime and http to no_trace

* Port remaining externals to no_trace

* Port webxr and Arc<Mutex<_>>

* Fix spelling in notrace doc

1 files changed, 1 insertions, 0 deletions

diff --git a/components/script/dom/xrsystem.rs b/components/script/dom/xrsystem.rs
index 15e4f9e65f4..907aa2935d1 100644
--- a/components/script/dom/xrsystem.rs
+++ b/components/script/dom/xrsystem.rs
@@ -40,6 +40,7 @@ pub struct XRSystem {
     active_immersive_session: MutNullableDom<XRSession>,
     active_inline_sessions: DomRefCell<Vec<Dom<XRSession>>>,
     test: MutNullableDom<XRTest>,
+    #[no_trace]
     pipeline: PipelineId,
 }