Using tracy::GetQueue instead of the sketchy static variable reference. (#19653)

runtime/src/iree/base/tracing/tracy.cc

diff --git a/runtime/src/iree/base/tracing/tracy.cc b/runtime/src/iree/base/tracing/tracy.cc
index a38f8c4..a51301a 100644
--- a/runtime/src/iree/base/tracing/tracy.cc
+++ b/runtime/src/iree/base/tracing/tracy.cc
@@ -17,7 +17,9 @@
 // HACK: tracy doesn't let us at this but we need it in order to create new
 // queue contexts. It's an implementation detail we have to take a dependency on
 // because tracy does not have an API for what we're doing (yet).
-extern tracy::moodycamel::ConcurrentQueue<tracy::QueueItem> tracy::s_queue;
+namespace tracy {
+moodycamel::ConcurrentQueue<QueueItem>& GetQueue();
+}  // namespace tracy
 #endif  // TRACY_ENABLE && IREE_TRACING_EXPERIMENTAL_CONTEXT_API
 
 #ifdef __cplusplus
@@ -457,8 +459,8 @@
   tracy::ProducerWrapper token;
   uint32_t thread_id = 0;
   iree_tracing_context_t()
-      : token_detail(tracy::s_queue),
-        token({tracy::s_queue.get_explicit_producer(token_detail)}),
+      : token_detail(tracy::GetQueue()),
+        token({tracy::GetQueue().get_explicit_producer(token_detail)}),
         thread_id(iree_tracing_context_t::next_tracing_thread_id++) {
     token.ptr->threadId = thread_id;
   }

runtime/src/iree/base/tracing/tracy.h

diff --git a/runtime/src/iree/base/tracing/tracy.h b/runtime/src/iree/base/tracing/tracy.h
index bc6d4ab..1aa0268 100644
--- a/runtime/src/iree/base/tracing/tracy.h
+++ b/runtime/src/iree/base/tracing/tracy.h
@@ -351,7 +351,9 @@
 // an API for what we're doing. We could propose one and try to get it landed
 // such that we at least did not need to manually write out structs and manage
 // the concurrent queues.
-#define IREE_TRACING_EXPERIMENTAL_CONTEXT_API 1
+#if !defined(IREE_TRACING_EXPERIMENTAL_CONTEXT_API)
+#define IREE_TRACING_EXPERIMENTAL_CONTEXT_API 0
+#endif  // !IREE_TRACING_EXPERIMENTAL_CONTEXT_API
 
 typedef struct iree_tracing_context_t iree_tracing_context_t;
 
@@ -434,7 +436,7 @@
   return NULL;
 }
 static inline void iree_tracing_context_free(iree_tracing_context_t* context) {}
-void iree_tracing_context_calibrate_executor(
+static inline void iree_tracing_context_calibrate_executor(
     iree_tracing_context_t* context, iree_tracing_executor_id_t executor_id,
     int64_t cpu_delta, uint64_t host_timestamp, uint64_t executor_timestamp) {}
 static inline void iree_tracing_context_zone_begin(