Denylist: enable iscsi test but skip prow

The multi-arch tests are skipped in kola code and
the x86 test have been working for some time now

However, the iscsi test fails in prow unexpectedly
so skip it here so it can run in the RHCOS jenkins
pipeline at least.
See openshift#1492
See coreos/coreos-assembler#3705

ci/prow-entrypoint.sh

@@ -130,7 +130,7 @@ kola_test_metal() {
     cosa compress --artifact=metal --artifact=metal4k
 
     # Run all testiso scenarios on metal artifact
-    kola testiso -S --output-dir ${ARTIFACT_DIR:-/tmp}/kola-testiso
+    kola testiso -S --output-dir ${ARTIFACT_DIR:-/tmp}/kola-testiso  --denylist-test iso-offline-install-iscsi*
 }
 
 # Ensure that we can create all platform images for COSA CI

kola-denylist.yaml

@@ -23,5 +23,7 @@
   osversion:
     - c9s
 
-- pattern: iso-offline-install-iscsi.bios
-  tracker: https://github.com/coreos/fedora-coreos-tracker/issues/1638
+# This test is failing only in prow, so it's skipped by prow
+# but not denylisted here so it can run on the rhcos pipeline
+#- pattern: iso-offline-install-iscsi.ibft.bios
+#  tracker: https://github.com/openshift/os/issues/1492