fix: replace AssertJ's deprecated asList() DSL method in PodTemplateHandlerTest (3465)

Replaced asList() method with asInstanceOf(InstanceOfAssertFactories.list(Type.class)
---
Replaced asList() method with asInstanceOf(InstanceOfAssertFactories.list(Type.class)
---
repushing the code dueto some failuers

Author: ShivamChavan01

jkube-kit/enricher/api/src/test/java/org/eclipse/jkube/kit/enricher/handler/PodTemplateHandlerTest.java

@@ -16,6 +16,8 @@
 import io.fabric8.kubernetes.api.model.LocalObjectReference;
 import io.fabric8.kubernetes.api.model.PodSpec;
 import io.fabric8.kubernetes.api.model.PodTemplateSpec;
+import io.fabric8.kubernetes.api.model.Volume;
+import io.fabric8.kubernetes.api.model.Container;
 import org.assertj.core.api.InstanceOfAssertFactories;
 import org.eclipse.jkube.kit.config.image.build.BuildConfiguration;
 import org.eclipse.jkube.kit.config.image.ImageConfiguration;
@@ -87,7 +89,7 @@ void getPodTemplate_withoutVolumeConfig_shouldGeneratePodTemplateWithoutVolume()
         assertThat(podTemplateSpec.getSpec().getVolumes()).isEmpty();
         assertThat(podTemplateSpec.getSpec())
             .extracting(PodSpec::getContainers).isNotNull()
-            .asList()
+            .asInstanceOf(InstanceOfAssertFactories.list(Container.class))
             .first()
             .hasFieldOrPropertyWithValue("name", "test-app")
             .hasFieldOrPropertyWithValue("image", "docker.io/test:latest")
@@ -105,10 +107,10 @@ void getPodTemplate_withEmptyVolumeAndWithoutServiceAccount_shouldGeneratePodTem
 
         PodTemplateSpec podTemplateSpec = podTemplateHandler.getPodTemplate(config, null, images);
         assertThat(podTemplateSpec.getSpec())
-            .hasFieldOrPropertyWithValue("serviceAccountName", null)
-            .returns(true, spec -> spec.getVolumes().isEmpty())
-            .extracting(PodSpec::getContainers)
-            .isNotNull();
+                .hasFieldOrPropertyWithValue("serviceAccountName", null)
+                .returns(true, spec -> spec.getVolumes().isEmpty())
+                .extracting(PodSpec::getContainers)
+                .isNotNull();
     }
 
     @Test
@@ -128,7 +130,8 @@ void getPodTemplate_withVolumeAndServiceAccount_shouldGeneratePodTemplateWithCon
 
       assertThat(podTemplateSpec.getSpec().getContainers()).isNotNull();
       assertThat(podTemplateSpec.getSpec())
-          .extracting(PodSpec::getVolumes).asList()
+          .extracting(PodSpec::getVolumes)
+          .asInstanceOf(InstanceOfAssertFactories.list(Volume.class))
           .isNotEmpty()
           .first()
           .hasFieldOrPropertyWithValue("name", "test")