config: add NeoFSBlockFetcher section

[AliceInHunterland]

Close #3632

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.25%. Comparing base (4b10f23) to head (1c65f32). Report is 32 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3642      +/-   ##
==========================================
- Coverage   83.27%   83.25%   -0.02%     
==========================================
  Files         334      334              
  Lines       46486    46494       +8     
==========================================
- Hits        38710    38709       -1     
- Misses       6200     6208       +8     
- Partials     1576     1577       +1     

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[AnnaShaleva]

@AliceInHunterland, please update the container IDs.

[AnnaShaleva]

@AliceInHunterland, ready for review?

[AliceInHunterland]

@AnnaShaleva Let me check #3668 first?

[AnnaShaleva]

Let me check https://github.com/nspcc-dev/neo-go/issues/3668 first?

I think that we won't change container IDs one more time, hence we can merge this PR and then use ready-to-use config files to check #3668. If some blocks are missing or corrupted, then we may reupload blocks to the existing containers.

[AliceInHunterland]

Let's merge this PR