Expose ExecutorStepExecution#getEnclosingLabel

src/main/java/org/jenkinsci/plugins/workflow/support/steps/ExecutorStepExecution.java

@@ -807,7 +807,7 @@ public String getAffinityKey() {
         /** hash code of list of heads */
         private transient int lastCheckedHashCode;
         private transient String lastEnclosingLabel;
-        @Restricted(NoExternalUse.class) // for Jelly
+
         public @CheckForNull String getEnclosingLabel() {
             if (!context.isReady()) {
                 return null;