Fix testStructureValidationAfterRelationsAttribute for schemaless mode

Skip the test when getSupportForAttributes() is false (schemaless mode)
because schemaless databases allow unknown attributes by design, so
Structure validation won't reject the 'name' attribute.

Co-authored-by: abnegate <5857008+abnegate@users.noreply.github.com>

Author: Copilot

tests/e2e/Adapter/Scopes/RelationshipTests.php

@@ -1104,6 +1104,12 @@ public function testStructureValidationAfterRelationsAttribute(): void
             return;
         }
 
+        if (!$database->getAdapter()->getSupportForAttributes()) {
+            // Schemaless mode allows unknown attributes, so structure validation won't reject them
+            $this->expectNotToPerformAssertions();
+            return;
+        }
+
         $database->createCollection("structure_1", [], [], [Permission::create(Role::any())]);
         $database->createCollection("structure_2", [], [], [Permission::create(Role::any())]);