feat: Implement an Unknown variant in the artifact locations #8359

Job	Run time
build-docusaurus	1m 39s
build-open-api-ui	4s
build (macos-14)	1m 0s
build-test-wasm	2m 49s
build (windows-latest)	4m 7s
build-ubuntu-X64	2m 21s
cargo-doc	39s
check	58s
test (ubuntu-24.04)	1m 10s
test (macos-14)	5m 55s
test (windows-latest)	5m 47s
e2e	0s
publish-wasm-test (mithril-client-wasm)	1m 47s
build-test-explorer	1m 45s
publish-docs	0s
send-tests-results	24s
publish-crate-test	0s
docker-mithril	0s
unstable-release	0s
deploy-testing	0s
	30m 25s

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