`BlockId` removal: `BlockBuilderProvider::new_block_at` (#2219)

* `BlockId` removal: `BlockBuilderProvider::new_block_at`

It changes the arguments of `BlockBuilderProvider::new_block_at` from:
`BlockId<Block>` to: `Block::Hash`

* update lockfile for {"polkadot", "substrate"}

* fix

---------

Co-authored-by: parity-processbot <>