K8SPG-719 use image.tag and image.repository to configure pmm3 server on e2e tests

Author: gkech

e2e-tests/functions

@@ -395,8 +395,8 @@ deploy_pmm3_server() {
 		helm repo add percona https://percona.github.io/percona-helm-charts/
 		helm install monitoring percona/pmm -n "${NAMESPACE}" \
 			--set fullnameOverride=monitoring \
-			--set imageTag=3-dev-latest \
-			--set imageRepo=perconalab/pmm-server \
+			--set image.tag=3-dev-latest \
+			--set image.repository=perconalab/pmm-server \
 			--set service.type=LoadBalancer \
 			--set platform="$platform" \
 			--force