update manifest creation to use udi container

After switching to UDI container in CRW 2.16, all the manifest creation sscripts will be broken and will need to be updated/optimized for the new single container (instead of 10 sidecars).

See https://main-jenkins-csb-crwqe.apps.ocp-c1.prod.psi.redhat.com/job/CRW_CI/job/Releng/job/get-3rd-party-deps-manifests

and https://github.com/redhat-developer/codeready-workspaces/tree/crw-2-rhel-8/product/manifest

Look in this script https://github.com/redhat-developer/codeready-workspaces/blob/crw-2-rhel-8/product/manifest/get-3rd-party-deps-manifests.sh
for refs to "codeready-workspaces-stacks-" or "plugin-java-*" etc.