[Merged by Bors] - test(hare): add db cleanup

[acud]

Motivation

Adding a cleanup for the in-memory db we are using in hare.

Description

There's too much dangling goroutines when we dump the output of the failing tests on hare due to the cleanup not being called on the inmem sqlite.

Test Plan

TODO

• Explain motivation or link existing issue(s)
• Test changes and document test plan
• Update documentation as needed
• Update changelog as needed

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 82.0%. Comparing base (6b39ce4) to head (8cd6352).
Report is 3 commits behind head on develop.

Files	Patch %	Lines
sql/database.go	71.4%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6221     +/-   ##
=========================================
- Coverage     82.0%   82.0%   -0.1%     
=========================================
  Files          308     308             
  Lines        33906   33913      +7     
=========================================
- Hits         27829   27828      -1     
- Misses        4304    4311      +7     
- Partials      1773    1774      +1     

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[acud]

bors merge

[spacemesh-bors]

Pull request successfully merged into develop.

Build succeeded:

• systest-status
• ci-status