add arch test to ensure abstract integration test inheritance

src/test/java/de/tum/cit/aet/artemis/atlas/architecture/TestArchitectureTest.java

@@ -0,0 +1,17 @@
+package de.tum.cit.aet.artemis.atlas.architecture;
+
+import static com.tngtech.archunit.lang.syntax.ArchRuleDefinition.classes;
+
+import org.junit.jupiter.api.Test;
+
+import de.tum.cit.aet.artemis.atlas.AbstractAtlasIntegrationTest;
+import de.tum.cit.aet.artemis.shared.architecture.AbstractArchitectureTest;
+
+class TestArchitectureTest extends AbstractArchitectureTest {
+
+    @Test
+    void integrationTestsShouldExtendAbstractAtlasIntegrationTest() {
+        classes().that().resideInAPackage(ARTEMIS_PACKAGE + ".atlas").and().haveSimpleNameEndingWith("IntegrationTest").should().beAssignableTo(AbstractAtlasIntegrationTest.class)
+                .because("All integration tests should extend AbstractAtlasIntegrationTest").check(testClasses);
+    }
+}