Use ledger specifier to write agent key files #8066

Job	Run time
install_check (ubuntu-latest, 3.10.9)	33s
copyright_doc_and_dependencies_check (ubuntu-latest, 3.10.9)	3m 11s
linter_checks (ubuntu-latest, 3.10.9)	7m 47s
lock_check (ubuntu-latest, 3.10.9)	1m 25s
lock_check (macos-latest, 3.10.9)	2m 35s
gitleaks	29s
lock_check (windows-latest, 3.10.9)	4m 42s
e2e (ubuntu-latest, 3.10.9)	1h 31m 46s
test (ubuntu-latest, 3.8)	28m 48s
test (ubuntu-latest, 3.9)	27m 46s
test (ubuntu-latest, 3.10.9)	29m 43s
test (ubuntu-latest, 3.11)	28m 29s
test (macos-latest, 3.8)	19m 20s
test (macos-latest, 3.9)	22m 23s
test (macos-latest, 3.10.9)	16m 36s
test (macos-latest, 3.11)	19m 4s
test (windows-latest, 3.8)	18m 26s
test (windows-latest, 3.9)	18m 17s
test (windows-latest, 3.10.9)	18m 36s
test (windows-latest, 3.11)	20m 23s
	6h 20m 19s

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