Support more setup menu options

[philipanda]

Not every setup menu config option is possible be updated using DCU.
It should be possible to update any UEFI variable as long as it exists in a given binary.

Example from OSFV: Suspend mode from Power Management Options is missing. All the suspend tests could be performed via SSH if only the option was modifiable using DCU.

[philipanda]

Sleep mode can be modified using DCU without any problems:

$ smmstoretool dump.rom list | grep Sleep
dasharo                            :SleepType (1 byte)

[philipanda]

DGPUState is another SMMSTORE variable that would be beneficial to be able to set using DCU.