Flip the flag --incompatible_no_kwargs_in_build_files

Fixes https://github.com/bazelbuild/bazel/issues/8021

RELNOTES: --incompatible_no_kwargs_in_build_files is enabled by default
PiperOrigin-RevId: 250317931
diff --git a/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java b/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java
index 2a64d89..143904c 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java
@@ -494,7 +494,7 @@
 
   @Option(
       name = "incompatible_no_kwargs_in_build_files",
-      defaultValue = "false",
+      defaultValue = "true",
       documentationCategory = OptionDocumentationCategory.STARLARK_SEMANTICS,
       effectTags = {OptionEffectTag.BUILD_FILE_SEMANTICS},
       metadataTags = {
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 55b2234..eb6b549 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
@@ -246,7 +246,7 @@
           .incompatibleExpandDirectories(true)
           .incompatibleNewActionsApi(true)
           .incompatibleNoAttrLicense(true)
-          .incompatibleNoKwargsInBuildFiles(false)
+          .incompatibleNoKwargsInBuildFiles(true)
           .incompatibleNoOutputAttrDefault(true)
           .incompatibleNoSupportToolsInActionInputs(false)
           .incompatibleNoTargetOutputGroup(false)