[tint] Move 'pointer_composite_access' to kShippedWithKillswitch

CTS has landed for this.

Bug: tint:2113
Change-Id: If2f532082a6592b68ed2d28fc233698cb3828649
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/173461
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
diff --git a/src/tint/lang/wgsl/features/status.cc b/src/tint/lang/wgsl/features/status.cc
index 2f592a1..22fd78e 100644
--- a/src/tint/lang/wgsl/features/status.cc
+++ b/src/tint/lang/wgsl/features/status.cc
@@ -36,7 +36,6 @@
             ////////////////////////////////////////////////////////////////////
             // Experimental features
             ///////////////////////////////////////////////////////////////////
-        case LanguageFeature::kPointerCompositeAccess:
         case LanguageFeature::kReadonlyAndReadwriteStorageTextures:
             return FeatureStatus::kExperimental;
 
@@ -44,6 +43,7 @@
             // Enabled features
             ////////////////////////////////////////////////////////////////////
         case LanguageFeature::kPacked4X8IntegerDotProduct:
+        case LanguageFeature::kPointerCompositeAccess:
         case LanguageFeature::kUnrestrictedPointerParameters:
             return FeatureStatus::kShippedWithKillswitch;