Upgrade codebase to polkadot-v0.9.23

[sea212]

Closes #809
Closes #715

This PR updates the dependencies.

Additional features

• Use original repositories instead of forks (previously many forks from Moonbeam were used)
• Use references in get_spot_price and corresponding RPCs
• Implement Moonbeam's VRFs (generate randomness) in the client, add it to author_rotateKeys rpc and to pallet-author-mapping
• Build benchmarks from parachain modules only when parachain modules are activated by another feature
• Use jsonrpsee instead of jsonrpc_core
• Use patched Purestake libraries to ensure all modules are fetched from original repositories and make try-runtime work for pallet-author-mapping

Notes
Executing try-runtime will show decoding errors for pallet-author-mapping. This happens after pre_upgrade and on_runtime_upgrade and can be ignored - the storage is correctly migrated, as the try-runtime checks prove. In addition, the runtime upgrade was tested on a Battery Station clone. Unfortunately nodes have to upgrade their clients to be able to determine the author of the first block after the runtime upgrade.

[maltekliemann]

Added a couple of formatting nitpicks, which I think should be fixed, but if you want to skip another CI cycle, I think we're good to go on this one. 👍

[maltekliemann]

Suggested change

	parity-scale-codec = { default-features = false, features = [
	"derive",
	"max-encoded-len",
	], version = "3.0.0" }
	parity-scale-codec = { default-features = false, features = ["derive", "max-encoded-len"], version = "3.0.0" }

[sea212]

3e31ec2

[maltekliemann]

👍