[Merged by Bors] - blocks/certifier: use sql database directly

[dshulyak]

related: #5039

it wasn't using any methods that are caching state, so it is a simple cleanup.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9970eec) 79.6% compared to head (226c91e) 79.6%.
Report is 4 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #5546     +/-   ##
=========================================
- Coverage     79.6%   79.6%   -0.1%     
=========================================
  Files          268     268             
  Lines        26746   26817     +71     
=========================================
+ Hits         21315   21365     +50     
- Misses        3913    3931     +18     
- Partials      1518    1521      +3     

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[dshulyak]

bors merge

[spacemesh-bors]

Build failed:

• systest-status

[dshulyak]

all tests got interrupted with same message

logger.go:130: 2024-02-06T16:09:54.874Z	WARN	TestFallback	proposals stream error	***"client": "smesher-11", "error": "rpc error: code = Unavailable desc = closing transport due to: connection error: desc = \"error reading from server: EOF\", received prior goaway: code: NO_ERROR, debug data: \"graceful_stop\"", "status": "rpc error: code = Unavailable desc = closing transport due to: connection error: desc = \"error reading from server: EOF\", received prior goaway: code: NO_ERROR, debug data: \"graceful_stop\""***

[dshulyak]

bors merge

[spacemesh-bors]

Pull request successfully merged into develop.

Build succeeded:

• ci-status
• systest-status