[release-1.8] RHIDP-8629: sizing requirements for external PostgreSQL deployment with RHDH#1544

themr0c merged 10 commits intoredhat-developer:release-1.8redhat-developer/red-hat-developers-documentation-rhdh:release-1.8from

openshift-cherrypick-robot:cherry-pick-1449-to-release-1.8openshift-cherrypick-robot/red-hat-developers-documentation-rhdh:cherry-pick-1449-to-release-1.8Copy head branch name to clipboard