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Consider separating common CI functions in a library
USHIFT-4135 PS4 setting is broken in some CI scripts
openshift/microshift#3767: USHIFT-4060: Add ci-includes functions.sh script
openshift/release#55500: USHIFT-4060: Refactor MicroShift scripts not to duplicate common functionality
openshift/release#55716: USHIFT-4060: Add dummy MicroShift includes step with common functionality
openshift/release#55722: USHIFT-4060: Make PS4 setting conditional on used environment variables
openshift/release#55771: USHIFT-4060: Fix bash source PS4 setting in MicroShift scripts
openshift/release#55814: USHIFT-4060: Fix PS4 setting to work properly when BASH_SOURCE is undefined