* BlockId removal: Client::runtime_version_at

It changes the arguments of `Client::runtime_version_at` from: `BlockId<Block>` to: `Block::Hash`

* Apply suggestions from code review

Co-authored-by: Anton <anton.kalyaev@gmail.com>

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Co-authored-by: Anton <anton.kalyaev@gmail.com>
Co-authored-by: parity-processbot <>