Add infrastructure for supporting multiple token slots per unlock method #3530

Job	Run time
checks_with_udev (RUST_LOG=stratisd=debug make -f Makefile test-loop, 1.83.0, cargo)	39m 8s
checks (make -f Makefile clippy, 1.83.0, clippy)	2m 21s
checks (PROFILEDIR=debug make -f Makefile build, 1.83.0, cargo)	1m 28s
checks (PROFILEDIR=debug make -f Makefile build-min, 1.83.0, cargo)	1m 30s
checks (PROFILEDIR=debug make -f Makefile build-min-no-systemd, 1.83.0, cargo)	1m 19s
checks (PROFILEDIR=debug make -f Makefile build-utils, 1.83.0, cargo)	1m 22s
checks (PROFILEDIR=debug make -f Makefile build-no-ipc, 1.83.0, cargo)	1m 12s
checks (PROFILEDIR=debug make -f Makefile stratisd-tools, 1.83.0, cargo)	1m 20s
checks (make -f Makefile docs-ci, 1.83.0, cargo)	1m 5s
checks (make -f Makefile test, 1.83.0, cargo)	1m 55s
checks (make -f Makefile build, 1.83.0, cargo)	2m 4s
checks (make -f Makefile build-min, 1.83.0, cargo)	1m 46s
checks (make -f Makefile build-no-ipc, 1.83.0, cargo)	1m 39s
	58m 9s

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