chore: bump signet-storage family to 0.8 (workspace 0.18.0) #688

Job	Run time
rust-library-base / Feature Checks	45s
rust-library-base / Base Checks / Docs	41s
rust-library-base / Base Checks / Clippy	38s
rust-library-base / Base Checks / Test Suite	2m 10s
rust-library-base / Base Checks / Rustfmt	19s
rust-library-base / Base Checks / Dylint	5m 37s
rust-library-base / Base Checks / doctest	1m 14s
	11m 24s

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