Default --experimental_keep_config_nodes_on_analysis_discard to false.

Net effect: "blaze config" only reports info from the last build. Not accumulated earlier builds.

RELNOTES: "blaze config" now only reports info from the last build. To compare configurations across multiple builds, redirect "blaze config" output to a file and run your favorite diff tool.
PiperOrigin-RevId: 444967794

src/main/java/com/google/devtools/build/lib/analysis/AnalysisOptions.java

@@ -65,7 +65,8 @@ public class AnalysisOptions extends OptionsBase {
 
   @Option(
       name = "experimental_keep_config_nodes_on_analysis_discard",
-      defaultValue = "true",
+      // TODO(b/230646046): remove this flag once the "false" default value has settled in safely
+      defaultValue = "false",
       documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
       effectTags = {OptionEffectTag.LOSES_INCREMENTAL_STATE},
       help =