Add invalidate block method and invalidated_blocks field to NonFinalizedState #2510

Job	Run time
Check deny.toml bans	41s
Check deny.toml bans --features default-release-binaries	45s
Check Cargo.lock is up to date	7m 49s
Check deny.toml bans --all-features	42s
Check deny.toml sources	41s
Check deny.toml sources --features default-release-binaries	42s
Install zebrad from lockfile without cache on ubuntu-latest	8m 52s
Check deny.toml sources --all-features	40s
Test stable on ubuntu-latest	42m 9s
Check for unused dependencies	8s
Test beta on ubuntu-latest	42m 26s
Test stable on macos-latest	57m 0s
Test stable on windows-latest	1h 4m 10s
Test beta on windows-latest	1h 4m 42s
Open or update issues for OS integration failures	0s
	4h 51m 27s

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