Integrate benchmark-block

[ggwpez]

Integrate the benchmark-block command to compare block execution time to consumed weight.
Example output from paritytech/substrate#11091:

Block 46 with  5299 tx used  67.04% of its weight ( 1,011,772,407 of  1,509,238,171 ns)    
Block 47 with  5299 tx used  65.75% of its weight (   992,298,518 of  1,509,238,171 ns)    
Block 48 with   208 tx used  69.95% of its weight (    47,328,881 of     67,660,429 ns)    
Block 49 with     2 tx used  69.93% of its weight (     6,524,096 of      9,329,057 ns)

Last one 😌. I will refactor afterwards to clean this up paritytech/substrate#11140
Currently working on a test.

Example invocation to measure some historic polkadot blocks:

./target/release/polkadot benchmark-block --from 9500000 --to 9500005 --execution wasm --wasm-execution compiled --pruning archive --db paritydb

[ggwpez]

bot rebase

[paritytech-processbot]

Rebasing