feat: Implement an Unknown variant in the artifact locations #8372

Job	Run time
build-open-api-ui	6s
build-test-wasm	2m 46s
build (macos-14)	2m 9s
build-docusaurus	1m 31s
build (windows-latest)	5m 14s
build-ubuntu-X64	4m 41s
cargo-doc	57s
check	1m 24s
test (ubuntu-24.04)	6m 50s
test (macos-14)	5m 47s
test (windows-latest)	5m 24s
publish-wasm-test (mithril-client-wasm)	1m 29s
build-test-explorer	1m 33s
publish-docs	0s
e2e (std, pythagoras, 10.1.3, 0, #1)	1m 38s
e2e (std, pythagoras, 10.1.3, 0, #2)	1m 30s
e2e (std, pythagoras, 10.1.4, 0, #1)	1m 31s
e2e (std, pythagoras, 10.1.4, 0, #2)	1m 40s
e2e (p2p, pythagoras, 10.1.4, 0, #1, --use-p2p-network)	1m 31s
e2e (std, pythagoras, 10.1.4, 0, #1, --mithril-era-regenesis-on-switch)	1m 55s
send-tests-results	17s
publish-crate-test	0s
docker-mithril	0s
unstable-release	0s
deploy-testing	0s
	49m 53s

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