Once https://issues.redhat.com/browse/OSSM-6830 subtask is done, update the bookinfo images in the pipeline and mtt

mtt: https://github.com/maistra/maistra-test-tool/blob/main/images.yaml#L3-L49

pipeline: https://gitlab.cee.redhat.com/istio/servicemesh-qe/jenkins-csb-declaration/-/blob/master/resources/install/install-bookinfo.sh?ref_type=heads#L159 ( amm maistra-2.6 case + update upgrade pipeline )