Deprecate DirectoryBasedDartSdk and transition existing uses to the new API

pkg/analyzer/lib/src/dart/sdk/sdk.dart

Index: pkg/analyzer/lib/src/dart/sdk/sdk.dart
diff --git a/pkg/analyzer/lib/src/dart/sdk/sdk.dart b/pkg/analyzer/lib/src/dart/sdk/sdk.dart
index 27e5549661d4f1f4f149769ec1d6bb93f3b87987..82d5842afc60ec2c1f03b9b564e64962a564584c 100644
--- a/pkg/analyzer/lib/src/dart/sdk/sdk.dart
+++ b/pkg/analyzer/lib/src/dart/sdk/sdk.dart
@@ -638,7 +638,7 @@ class FolderBasedDartSdk extends AbstractDartSdk {
   }
 
   static String getSdkProperty(ResourceProvider resourceProvider) {
-    String exec = io.Platform.executable;
+    String exec = io.Platform.resolvedExecutable;
     if (exec.length == 0) {
       return null;
     }