Add infrastructure for supporting multiple token slots per unlock method #5617

Job	Run time
python-based-tests	2m 25s
pylint	36s
checks (make -f Makefile fmt-ci, 1.84.0, rustfmt)	59s
checks (make -f Makefile check-typos, 1.84.0, cargo)	55s
stratis-cli-checks	8m 47s
stratis-min-cli-checks	2m 18s
tests-with-testing-repo (HEAD, --post-test-check=verify-filesystem-symlinks --post-test-check=ver...	29m 20s
tests-with-testing-repo (v3.6.2, --highest-revision-number=6)	29m 34s
shell-checks	29s
	1h 15m 23s

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