spike(ACS): can we set the OCP version in ROSA HCP? (#68831)

* spike: can we set the OCP version in ROSA HCP?

* add rosa image

* change acs-fleet-manager OCP_VERSION to 4.17.38

* set default to latest available version of OCP (in ROSA)

---------

Co-authored-by: Johannes Malsam <[email protected]>

Author: tommartensen

ci-operator/config/stackrox/acs-fleet-manager/stackrox-acs-fleet-manager-main.yaml

@@ -7,6 +7,10 @@ base_images:
     name: release
     namespace: openshift
     tag: golang-1.23
+  rosa-hcp:
+    name: automation-flavors
+    namespace: stackrox
+    tag: rosa-stable
 build_root:
   image_stream_tag:
     name: release
@@ -48,7 +52,7 @@ tests:
 - as: e2e
   steps:
     env:
-      OCP_VERSION: ocp/fast-4.17
+      OCP_VERSION: 4.17.38
     test:
     - ref: ipi-install-rbac
     - as: test
@@ -73,7 +77,7 @@ tests:
         requests:
           cpu: 2000m
           memory: 6000Mi
-    workflow: stackrox-automation-flavors-ocp-4-e2e
+    workflow: stackrox-automation-flavors-rosa-hcp-e2e
 zz_generated_metadata:
   branch: main
   org: stackrox

ci-operator/step-registry/stackrox/automation-flavors/rosa-hcp-e2e/stackrox-automation-flavors-rosa-hcp-e2e-workflow.yaml

@@ -8,11 +8,16 @@ workflow:
         export MANAGED_CP=true
         export NODE_COUNT=2
         export WAIT_FOR_NODES_TRIES=30
+        export ROSA_ARGS="--version=${OCP_VERSION}"
         /usr/bin/openshift-ci.sh create rosa
       credentials:
       - mount_path: /tmp/vault/stackrox-automation-flavors
         name: stackrox-automation-flavors
         namespace: test-credentials
+      env:
+      # By default, this is set to the latest available version of OCP
+      - name: OCP_VERSION
+        default: ''
       from: rosa-hcp
       resources:
         requests: