Skip custom image test

temporarily skip custom image test for released 3.9.0, until issue #5914 get fixed

Signed-off-by: Luca Carrogu <carrogu@amazon.com>

Author: lukeseawalker

tests/integration-tests/configs/released.yaml

@@ -192,11 +192,12 @@ test-suites:
           instances: {{ common.INSTANCES_DEFAULT_X86 }}
           oss: ["ubuntu2004"]
           schedulers: ["slurm"]
-    test_api.py::test_custom_image:
-      dimensions:
-        - regions: ["sa-east-1"]
-          instances: {{ common.INSTANCES_DEFAULT_X86 }}
-          oss: ["alinux2"]
+# Skip because of https://github.com/aws/aws-parallelcluster/issues/5914
+#    test_api.py::test_custom_image:
+#      dimensions:
+#        - regions: ["sa-east-1"]
+#          instances: {{ common.INSTANCES_DEFAULT_X86 }}
+#          oss: ["alinux2"]
     test_api.py::test_official_images:
       dimensions:
         - regions: ["sa-east-1"]