flip --incompatible_use_platforms_repo_for_constraints=true since most important downstream projects failures are now mitigated. Only flatbuffers remains broken https://buildkite.com/bazel/bazelisk-plus-incompatible-flags/builds/1271

PR to disable project for downstream pipeline bazelbuild/continuous-integration#1453

PiperOrigin-RevId: 475766466
Change-Id: I4f57b0d7dbfbbcbc96cc18116f241e356aa96911

Author: Googler

src/main/java/com/google/devtools/build/lib/analysis/config/CoreOptions.java

@@ -80,7 +80,7 @@ public class CoreOptions extends FragmentOptions implements Cloneable {
 
   @Option(
       name = "incompatible_use_platforms_repo_for_constraints",
-      defaultValue = "false",
+      defaultValue = "true",
       documentationCategory = OptionDocumentationCategory.OUTPUT_PARAMETERS,
       effectTags = {OptionEffectTag.AFFECTS_OUTPUTS},
       metadataTags = {OptionMetadataTag.INCOMPATIBLE_CHANGE},