Enable --incompatible_no_output_attr_default by default

Fixes https://github.com/bazelbuild/bazel/issues/7950

RELNOTES[INC]: `--incompatible_no_output_attr_default` is enabled by default.

PiperOrigin-RevId: 243362752
diff --git a/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java b/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java
index ce47ee6..983f3cd 100644
--- a/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java
+++ b/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java
@@ -180,7 +180,6 @@
 
   public abstract boolean internalSkylarkFlagTestCanary();
 
-
   public abstract boolean incompatibleDoNotSplitLinkingCmdline();
 
   /** Returns a {@link Builder} initialized with the values of this instance. */
@@ -223,7 +222,7 @@
           .incompatibleNewActionsApi(false)
           .incompatibleNoAttrLicense(true)
           .incompatibleNoKwargsInBuildFiles(false)
-          .incompatibleNoOutputAttrDefault(false)
+          .incompatibleNoOutputAttrDefault(true)
           .incompatibleNoSupportToolsInActionInputs(false)
           .incompatibleNoTargetOutputGroup(false)
           .incompatibleNoTransitiveLoads(true)