Change ChainDescriptions into blobs #13824

Job	Run time
benchmark-test	16m 8s
check-outdated-cli-md	7m 32s
default-features-and-witty-integration-test	14m 6s
execution-wasmtime-test	3m 15s
metrics-test	1m 21s
remote-net-test	5m 47s
wasm-application-test	3m 32s
check-wit-files	2m 16s
ethereum-tests	21m 46s
lint-check-copyright-headers	15s
lint-cargo-machete	1m 22s
lint-unexpected-chain-load-operations	4s
storage-service-tests	2m 24s
test-readme-scripts	2m 18s
web	6m 6s
lint-cargo-clippy	9m 13s
lint-cargo-doc	9m 52s
lint-cargo-fmt	32s
lint-check-all-features	11m 55s
lint-check-for-outdated-readme	1m 58s
lint-check-linera-service-graphql-schema	7m 1s
lint-wasm-applications	1m 51s
lint-taplo-fmt	2m 13s
	2h 12m 47s

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