Faster archiver restart

[nazar-pc]

If you ever restarted your node and though that archiver takes a really long time to start you were absolutely right!

This set of changes turns this (note timestamps):

2023-09-19 01:18:43.110  [Consensus] 🏷  Local node identity is: 12D3KooWRcri8BhpLfMYVKCh5oEP1YCdQfhy7pEKHcmmESPTkcaq    
2023-09-19 01:19:32.272  [Consensus] Last archived block 171381    
2023-09-19 01:19:32.272  [Consensus] Archiving already produced blocks 171382..=181309    
2023-09-19 01:22:24.775  [Consensus] 🧑‍🌾 Starting Subspace Authorship worker    

Into this:

2023-09-19 03:16:56.388  [Consensus] 🏷  Local node identity is: 12D3KooWRcri8BhpLfMYVKCh5oEP1YCdQfhy7pEKHcmmESPTkcaq    
2023-09-19 03:16:56.400  [Consensus] Last archived block 171381    
2023-09-19 03:16:56.400  [Consensus] Archiving already produced blocks 171382..=181309    
2023-09-19 03:17:12.856  [Consensus] 🧑‍🌾 Starting Subspace Authorship worker    

That is 3m41s vs 16s initialization time!

I expect similarly massive changes in block import performance (for essentialy empty blocks) once paritytech/polkadot-sdk#1598 or similar is incorporated.

Resolves #1852

Code contributor checklist:

• I have read, understood and followed contributing guide

[nazar-pc]

Rebased on main, no other changes