Add --incompatible_build_transitive_python_runfiles alias for --experimental_build_transitive_python_runfiles

This is to make clear that it results in an incompatible behavior change.

Work towards #16303

RELNOTES: Add --incompatible_build_transitive_python_runfiles alias. See #16303
PiperOrigin-RevId: 475703597
Change-Id: I242925eb9e3179a88287faaab8212c43006466d4

Author: rickeylev

src/main/java/com/google/devtools/build/lib/rules/python/PythonOptions.java

@@ -227,9 +227,11 @@ public String getTypeDescription() {
       defaultValue = "true",
       documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
       effectTags = {OptionEffectTag.LOADING_AND_ANALYSIS, OptionEffectTag.AFFECTS_OUTPUTS},
+      metadataTags = {OptionMetadataTag.INCOMPATIBLE_CHANGE},
       help =
           "Build the runfiles trees of py_binary targets that appear in the transitive "
-              + "data runfiles of another binary.")
+              + "data runfiles of another binary.",
+      oldName = "incompatible_build_transitive_python_runfiles")
   public boolean buildTransitiveRunfilesTrees;
 
   @Option(