Merge pull request #73007 from xedin/promote-dynamic-actor-isolation-to-upcoming-feature

[SE-0423] Promote `DynamicActorIsolation` to an upcoming feature and add a way to disable checks

include/swift/Basic/LangOptions.h

@@ -593,6 +593,9 @@ namespace swift {
     /// type-checking, SIL verification, and IR emission,
     bool BypassResilienceChecks = false;
 
+    /// Disables `DynamicActorIsolation` feature.
+    bool DisableDynamicActorIsolation = false;
+
     /// Whether or not to allow experimental features that are only available
     /// in "production".
 #ifdef NDEBUG
@@ -605,6 +608,11 @@ namespace swift {
       return ActiveConcurrencyModel == ConcurrencyModel::TaskToThread;
     }
 
+    bool isDynamicActorIsolationCheckingEnabled() const {
+      return !DisableDynamicActorIsolation &&
+             hasFeature(Feature::DynamicActorIsolation);
+    }
+
     LangOptions();
 
     /// Sets the target we are building for and updates platform conditions