chore: fix/upgrade-osd-gcp-operator-to-ocp-4.19 (#75541)

* fix/upgrade-osd-gcp-operator-to-ocp-4.19

Signed-off-by: Fortune-Ndlovu <fndlovu@redhat.com>

* Update all RHDH CI configuration files to use OpenShift 4.19 instead of 4.15

Signed-off-by: Fortune-Ndlovu <fndlovu@redhat.com>

* Update RHDH main CI config to OpenShift 4.18, revert release configs to 4.15

Updates the main branch configuration to use OpenShift 4.18 instead of 4.19.
Reverts release-1.7, release-1.8, and release-1.9 configs back to 4.15 to maintain
compatibility with their respective RHDH versions.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Signed-off-by: Fortune-Ndlovu <fndlovu@redhat.com>

* Update redhat-developer-rhdh-main.yaml

* Update OSD version from 4.17.12 to 4.18.36 for RHDH GCP tests

Updates the OpenShift Dedicated version for e2e-osd-gcp-helm-nightly and
e2e-osd-gcp-operator-nightly tests from EOL version 4.17.12 to 4.18.36.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Signed-off-by: Fortune-Ndlovu <fndlovu@redhat.com>

* Update RHDH main CI config to OpenShift 4.20

Updates build_root, release version, and OSD_VERSION to 4.20 for all
RHDH main branch CI jobs.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Signed-off-by: Fortune-Ndlovu <fndlovu@redhat.com>

* update OSD_VERSION to the latest z steam version 4.20.17

Signed-off-by: Fortune-Ndlovu <fndlovu@redhat.com>

---------

Signed-off-by: Fortune-Ndlovu <fndlovu@redhat.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Fortune-Ndlovu

ci-operator/config/redhat-developer/rhdh/redhat-developer-rhdh-main.yaml

@@ -2,14 +2,14 @@ build_root:
   image_stream_tag:
     name: release
     namespace: openshift
-    tag: rhel-9-release-golang-1.22-openshift-4.19
+    tag: rhel-9-release-golang-1.24-openshift-4.20
   use_build_cache: true
 releases:
   latest:
     release:
       architecture: amd64
       channel: fast
-      version: "4.15"
+      version: "4.20"
 resources:
   '*':
     limits:
@@ -270,7 +270,7 @@ tests:
   steps:
     allow_skip_on_success: true
     env:
-      OSD_VERSION: 4.17.12
+      OSD_VERSION: 4.20.17
     post:
     - ref: redhat-developer-rhdh-send-data-router
     - ref: redhat-developer-rhdh-send-alert
@@ -286,7 +286,7 @@ tests:
   steps:
     allow_skip_on_success: true
     env:
-      OSD_VERSION: 4.17.12
+      OSD_VERSION: 4.20.17
     post:
     - ref: redhat-developer-rhdh-send-data-router
     - ref: redhat-developer-rhdh-send-alert