Revert PKCE flag

Author: manodnyab

plugins/core/jetbrains-community/resources/META-INF/aws.toolkit.core.xml

@@ -68,7 +68,7 @@
         <postStartupActivity implementation="software.aws.toolkits.jetbrains.core.AwsTelemetryPrompter"/>
 
         <registryKey key="aws.dev.useDAG" description="True if DAG should be used instead of authorization_grant with PKCE"
-                     defaultValue="false" restartRequired="false"/>
+                     defaultValue="true" restartRequired="false"/>
         <registryKey key="aws.telemetry.endpoint" description="Endpoint to use for publishing AWS client-side telemetry"
                      defaultValue="https://client-telemetry.us-east-1.amazonaws.com" restartRequired="true"/>
         <registryKey key="aws.telemetry.identityPool" description="Cognito identity pool to use for publishing AWS client-side telemetry"