fix(nns): Revert spawn state when ledger unavailable and drop lock (#… #22650

Job	Run time
Bazel Test All	38m 7s
Bazel Build All Config Check	0s
Bazel Build Fuzzers	2m 37s
Bazel Build Fuzzers AFL	9m 4s
Bazel Test macOS Intel	1h 23m 39s
Build IC	20m 13s
Cargo Build Release Linux	23s
Cargo Clippy Linux	26s
Python CI Tests	2m 0s
Build Determinism (//publish/binaries:upload, release, build-ic/release, false)	34s
Build Determinism (//publish/canisters:upload, canisters, build-ic/canisters, false)	35s
Build Determinism (//ic-os/guestos/envs/prod:upload_disk-img, guest-os/update-img, build-ic/icos/...	35s
Build Determinism (//ic-os/hostos/envs/prod:upload_update-img, host-os/update-img, build-ic/icos/...	39s
Build Determinism (//ic-os/setupos/envs/prod:upload_disk-img, setup-os/disk-img, build-ic/icos/se...	36s
	2h 39m 28s

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