Provide keyutils with persistence-after-reboot using secret-service #190

Job	Run time
ci_nix (linux-native)	32s
ios_native	44s
msrv_native	16s
ci_nix (sync-secret-service)	33s
ci_non_nix (macos-latest)	35s
ci_nix (linux-native,sync-secret-service)	32s
ci_non_nix (windows-latest)	3m 17s
ci_nix (sync-secret-service,crypto-rust)	55s
ci_nix (sync-secret-service,crypto-openssl)	1m 3s
ci_nix (async-secret-service,tokio,crypto-rust)	1m 18s
ci_nix (async-secret-service,async-io,crypto-rust)	1m 13s
ci_nix (async-secret-service,tokio,crypto-openssl)	1m 11s
ci_nix (async-secret-service,async-io,crypto-openssl)	1m 20s
ci_nix (linux-native-sync-persistent,crypto-rust)	57s
ci_nix (linux-native-sync-persistent,crypto-openssl)	59s
ci_nix (linux-native-async-persistent,tokio,crypto-rust)	1m 31s
ci_nix (linux-native-async-persistent,async-io,crypto-rust)	1m 24s
ci_nix (linux-native-async-persistent,tokio,crypto-openssl)	1m 23s
ci_nix (linux-native-async-persistent,async-io,crypto-openssl)	1m 24s
	21m 7s

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