Reorganise deps into workspace

[mattdean-digicatapult]

Re-organises our dpeendencies into the workspace Cargo.toml so that we can refer to consistent versions everywhere. This should make it easier for us to upgrade dependencies (especially substrate deps) in the future.

Note this doesn't upgrade any dependencies or change nay code other than some package renames. Hence no benchmark updates

[github-actions]

This PR updates the following pallets - they may also require updates to their extrinsic weights:
process-validation symmetric-key utxo-nft

For the author and any reviewers:

• consider whether the changes could significantly affect the weight of any extrinsics
• consider whether benchmarks need updating to correctly cover weight variations over inputs

For a guide on running benchmarks to update weights see calculating weights