facts: add efibootmgr.EFIBootMgr #1512

Job	Run time
lint	24s
type-check	18s
end-to-end-test (ubuntu-20.04, local)	24s
unit-test (ubuntu-20.04, 3.8)	38s
end-to-end-test (ubuntu-20.04, ssh)	1m 21s
unit-test (ubuntu-20.04, 3.9)	37s
end-to-end-test (ubuntu-20.04, docker)	33s
unit-test (ubuntu-20.04, 3.10)	39s
end-to-end-test (ubuntu-latest, local)	24s
unit-test (ubuntu-20.04, 3.11)	33s
end-to-end-test (ubuntu-latest, ssh)	1m 16s
unit-test (ubuntu-20.04, 3.12)	43s
end-to-end-test (ubuntu-latest, docker)	32s
unit-test (ubuntu-latest, 3.8)	38s
end-to-end-test (macos-latest, local)	27s
unit-test (ubuntu-latest, 3.9)	38s
unit-test (ubuntu-latest, 3.10)	31s
unit-test (ubuntu-latest, 3.11)	31s
unit-test (ubuntu-latest, 3.12)	42s
unit-test (macos-12, 3.11)	54s
unit-test (windows-2022, 3.11)	54s
tests-done	3s
	13m 40s

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