chore:Replace organisation units with no groups integrity check with SQL

[jason-p-pickering]

Replaces the integrity check relating to organisation units with no groups with an SQL based equivalent.

[david-mackessy]

nice, and covered with tests, even better 👍

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
0.0% Duplication

[codecov]

Codecov Report

Merging #15801 (801e095) into master (20bb935) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #15801   +/-   ##
=========================================
  Coverage     66.34%   66.34%           
- Complexity    31430    31432    +2     
=========================================
  Files          3489     3489           
  Lines        130091   130093    +2     
  Branches      15191    15191           
=========================================
+ Hits          86313    86316    +3     
  Misses        36700    36700           
+ Partials       7078     7077    -1     

Flag	Coverage Δ
integration	50.04% <100.00%> (ø)
integration-h2	32.33% <0.00%> (-0.01%)	⬇️
unit	30.39% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...isp/dhis/dataintegrity/DataIntegrityCheckType.java	100.00% <ø> (ø)
...is/dataintegrity/FlattenedDataIntegrityReport.java	97.27% <100.00%> (+0.07%)	⬆️
...his/dataintegrity/DefaultDataIntegrityService.java	76.68% <100.00%> (-0.07%)	⬇️

... and 2 files with indirect coverage changes

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