feat(pallet-market): implement activate_deals

[th7nder]

Description

Activated Deal is a deal that's required to be verified in some time by Storage Provider Proofs, if not, Storage Provider will be slashed. This is more like a 'data storage' function, responsibility for calling that lies on the Storage Provider Pallet.

Important points for reviewers

• Reference implementation
• Design: docs: design Market Pallet #72

Checklist

• Are there important points that reviewers should know?
  • If yes, which ones?
• Make sure that you described what this change does.
• If there are follow-ups, have you created issues for them?
  • If yes, which ones? / List them here
• Have you tested this solution?
• Were there any alternative implementations considered?
• Did you document new (or modified) APIs?

[jmg-duarte]

I didn't find anything that was plain wrong, but I think there's space to make the overall structure easier to follow and check for vec bound bugs - i.e. no space to push.

Hope it's not too nitpicky, if it is, let me know!

[cernicc]

Looks good. Some grammar nazi comments left :D

[cernicc]

Good job 👍