DMI vendor information fields do not provide enough information for us to distinguish between Amazon EC2 virtual machines and bare-metal instances. SMBIOS provides a BIOS Information table (https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.4.0.pdf Ch. 7) that provides a field to indicate that the current machine is a virtual machine. On EC2 virtual machine instances, this field is set, while bare-metal instances leave this unset, so we inspect the field via the kernel's /sys/firemware/dmi/entries interface. Fixes #18929
System and Service Manager
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