Flag flip for incompatible_display_source_file_location.

RELNOTES[INC]: Query output=xml/proto/location for source files will now show the location of line 1 of the source file (as the new default) instead of its location in the BUILD file.

PiperOrigin-RevId: 351800418

Author: zhengwei143

src/main/java/com/google/devtools/build/lib/query2/common/CommonQueryOptions.java

@@ -161,7 +161,7 @@ public Set<Setting> toSettings() {
   // TODO(tanzhengwei): Clean up in next major release
   @Option(
       name = "incompatible_display_source_file_location",
-      defaultValue = "false",
+      defaultValue = "true",
       documentationCategory = OptionDocumentationCategory.QUERY,
       effectTags = {OptionEffectTag.TERMINAL_OUTPUT},
       metadataTags = {