Add pull image with tag prefix and XML

After the parent commit, the registry might contain prefixed images.
This commit adds the functionality to pull such prefixed image. Since we
rename the pulled image (to have a consistent name, from whichever
registry we might pull), remove the prefix as well so that it can be
used with other CI functionality (remove image, use in test, ...)

Examples for renaming:
- pull from internal_registry for x86
  internal_registry/oai-gnb:branchA => oai-ci/oai-gnb:branchA
- pull from internal registry for ARM with "arm_" prefix
  internal_registry/oai-gnb:arm_branchA => oai-ci/oai-gnb:branchA
- pull from x86 other registry (e.g., openshift)
  openshift/namespace/oai-gnb:branchA => oai-ci/oai-gnb:branchA

ci-scripts/cls_cluster.py

@@ -226,7 +226,7 @@ class Cluster:
 	def _undeploy_pod(self, filename):
 		self.cmd.run(f'oc delete -f {filename}')
 
-	def PullClusterImage(self, HTML, node, images):
+	def PullClusterImage(self, HTML, node, images, tag_prefix):
 		logging.debug(f'Pull OC image {images} to server {node}')
 		self.testCase_id = HTML.testCase_id
 		with cls_cmd.getConnection(node) as cmd:
@@ -242,7 +242,7 @@ class Cluster:
 				return False
 			tag = cls_containerize.CreateTag(self.ranCommitID, self.ranBranch, self.ranAllowMerge)
 			registry = f'{self.OCRegistry}/{CI_OC_RAN_NAMESPACE}'
-			success, msg = cls_containerize.Containerize.Pull_Image(cmd, images, tag, registry, None, None)
+			success, msg = cls_containerize.Containerize.Pull_Image(cmd, images, tag, tag_prefix, registry, None, None)
 			OC_logout(cmd)
 		param = f"on node {node}"
 		if success: