chore: prepare new dev version

[Ad96el]

fixes new Dev version

Checklist:

• I have verified that the code works
  • No panics! (checked arithmetic ops, no indexing array[3] use get(3), ...)
• I have verified that the code is easy to understand
  • If not, I have left a well-balanced amount of inline comments
• I have left the code in a better state
• I have documented the changes (where applicable)
  • Either PR or Ticket to update the Docs
  • Link the PR/Ticket here

[weichweich]

Cool once we branched off the release branch.

[Ad96el]

I have also removed the migrations for the parachainStaking and the bump in storage versions. A minimal migration struct is still present, just in case we want to add a new pallet to the runtime and need to initialize the storage version.