Deprecated URI: redfish/v1/Managers/ {ManagerId}/VirtualMedia/

The DMTF has deprecated the uri for the VirtualMedia in their latest spec, please see 6.144.2 from https://www.dmtf.org/sites/default/files/standards/documents/DSP2046_2023.2.pdf.

Suggestion is to let ironic/ironic-inspector follow the new uri, i.e., /redfish/v1/Systems/{ComputerSystemId}/VirtualMedia/ instead of /redfish/v1/Managers/
{ManagerId}/VirtualMedia/

From a compatibility point of view, we need to check that older servers' BMCs are "exposing" their virtualmedia on the new uri (which seems to be the case for some of them, because we've had some redundant information in the redfish schema wrt to the virtualmedia from some time ago...).