IGNITE-26966 Add comments

Author: chesnokoff

modules/core/src/main/java/org/apache/ignite/internal/management/rollingupgrade/RollingUpgradeDisableTask.java

@@ -54,6 +54,8 @@ protected RollingUpgradeDisableJob(NoArg arg, boolean debug) {
 
         /** {@inheritDoc} */
         @Override public SecurityPermissionSet requiredPermissions() {
+            // This task does nothing but delegates the call to the Ignite processor.
+            // Therefore, it is safe to execute task without any additional permissions check.
             return NO_PERMISSIONS;
         }
 

modules/core/src/main/java/org/apache/ignite/internal/management/rollingupgrade/RollingUpgradeEnableTask.java

@@ -52,6 +52,8 @@ protected RollingUpgradeEnableJob(RollingUpgradeEnableCommandArg arg, boolean de
 
         /** {@inheritDoc} */
         @Override public SecurityPermissionSet requiredPermissions() {
+            // This task does nothing but delegates the call to the Ignite processor.
+            // Therefore, it is safe to execute task without any additional permissions check.
             return NO_PERMISSIONS;
         }