Document how to meter usage of PAM/DM on OCP.

• List all available labels which are added when using Business automation operator
• Link to OCP Cost management metrics operator (OCP 4.7)
• Link to OCP Metering operator (OCP 4.6) - https://docs.openshift.com/container-platform/4.6/metering/metering-installing-metering.html

https://docs.google.com/document/d/1bcKHAgu67ABEJd27eI-WBXT0q-QGUIvrunahfS_c1tI/edit?disco=AAAAGgWx6Pc&ts=5eb9b6ba&usp_dm=false