Run storage benchmarks before release

[ggwpez]

The storage weights of all chains should be updated before a release. This means to:

• Warp sync nodes for each chain to head
• Stop the node
• Run polkadot benchmark storage --state-version <int> -d <dir>

And then commit the files back upstream. Sadly it would need to be done twice - once for rocks and once for parity db.
In the future, the benchmarking should support to insert the state from a state snapshot.