[PERFSCALE-2503]: Add ROSA 4.15 Controlplane tests (#43862)

* [PERFSCALE-2504]: Add ROSA 4.15 Controlplane tests

This PR introduces, control-plane tests for classic
ROSA 4.15 for Medium & Small scale nodes.

Signed-off-by: Krishna Harsha Voora <krvoora@redhat.com>

* Minor nits

* Rebase changes

---------

Signed-off-by: Krishna Harsha Voora <krvoora@redhat.com>

ci-operator/config/openshift-qe/ocp-qe-perfscale-ci/openshift-qe-ocp-qe-perfscale-ci-main__rosa-4.15-nightly-x86.yaml

@@ -0,0 +1,91 @@
+build_root:
+  image_stream_tag:
+    name: ci-tools-build-root
+    namespace: ci
+    tag: latest
+images:
+- dockerfile_path: prow/Dockerfile
+  to: ocp-qe-perfscale-ci-rosa-4.15-nightly
+promotion:
+  namespace: ci
+  tag: latest
+releases:
+  latest:
+    candidate:
+      product: ocp
+      stream: nightly
+      version: "4.15"
+resources:
+  '*':
+    requests:
+      cpu: 100m
+      memory: 200Mi
+tests:
+- as: perfscale-rosa-multiaz-control-plane-120nodes-periodic
+  cron: 0 6 * * 5
+  steps:
+    cluster_profile: aws-perfscale
+    env:
+      CHANNEL_GROUP: nightly
+      COMPUTE_MACHINE_TYPE: m5.xlarge
+      ENABLE_AUTOSCALING: "false"
+      MULTI_AZ: "true"
+      OPENSHIFT_VERSION: "4.15"
+      REPLICAS: "120"
+    test:
+    - chain: openshift-qe-control-plane
+    workflow: rosa-aws-sts
+  timeout: 6h0m0s
+- as: perfscale-rosa-multiaz-control-plane-24nodes-periodic
+  cron: 0 12 * * 5
+  steps:
+    cluster_profile: aws-perfscale-qe
+    env:
+      CHANNEL_GROUP: nightly
+      COMPUTE_MACHINE_TYPE: m5.xlarge
+      ENABLE_AUTOSCALING: "false"
+      MULTI_AZ: "true"
+      OPENSHIFT_VERSION: "4.15"
+      READY_WAIT_TIMEOUT: 30m
+      REPLICAS: "24"
+    test:
+    - chain: openshift-qe-control-plane
+    workflow: rosa-aws-sts
+  timeout: 5h0m0s
+- as: perfscale-rosa-multiaz-node-density-heavy-24nodes-periodic
+  cron: 0 15 * * 5
+  steps:
+    cluster_profile: aws-perfscale-qe
+    env:
+      CHANNEL_GROUP: nightly
+      COMPUTE_MACHINE_TYPE: m5.xlarge
+      ENABLE_AUTOSCALING: "false"
+      MULTI_AZ: "true"
+      OPENSHIFT_VERSION: "4.15"
+      PODS_PER_NODE: "100"
+      READY_WAIT_TIMEOUT: 30m
+      REPLICAS: "24"
+    test:
+    - chain: openshift-qe-node-density-heavy
+    workflow: rosa-aws-sts
+- as: perfscale-rosa-multiaz-node-density-cni-24nodes-periodic
+  cron: 0 18 * * 5
+  steps:
+    cluster_profile: aws-perfscale-qe
+    env:
+      CHANNEL_GROUP: nightly
+      COMPUTE_MACHINE_TYPE: m5.xlarge
+      ENABLE_AUTOSCALING: "false"
+      MULTI_AZ: "true"
+      OPENSHIFT_VERSION: "4.15"
+      PODS_PER_NODE: "100"
+      READY_WAIT_TIMEOUT: 30m
+      REPLICAS: "24"
+    test:
+    - chain: openshift-qe-node-density-cni
+    workflow: rosa-aws-sts
+zz_generated_metadata:
+  branch: main
+  org: openshift-qe
+  repo: ocp-qe-perfscale-ci
+  variant: rosa-4.15-nightly-x86