This new config option allows operators to pass custom configuration
options to the ironic-conductor service.
Usage example:
cat << EOF > ./config.txt
[DEFAULT]
enabled_hardware_types = intel-ipmi, ipmi, idrac
enabled_power_interfaces = ipmitool, idrac-wsman
EOF
juju config ironic-conductor \
hardware-enablement-options=@./config.txt
Closes-Bug: #2002151
Change-Id: I3e2ca81b272e61e4069d80b52902b243a5f0ba19